Project Hail Mary

Project Hail Mary is an absolute masterpiece of hard sci-fi. Andy Weir does it again — this book is every bit as gripping and clever as The Martian, but with even higher stakes.

The story follows Ryland Grace, who wakes up alone on a spaceship with no memory of how he got there or why he’s on a desperate mission light-years from Earth. What follows is a brilliant blend of problem-solving, scientific ingenuity, and heartfelt moments that had me completely hooked from the first page.

Weir’s greatest strength is making complex science feel accessible and exciting. You’ll learn real physics, biology, and astronomy while cheering for characters that feel incredibly real (yes, even the non-human ones). The twists are perfectly timed, the tension is relentless, and the ending is deeply satisfying.

If you love smart, optimistic sci-fi with humor, heart, and “one more chapter” energy, this is essential reading. Easily one of my favorite books of the last few years.

Highly recommended — 5/5 stars.

If I could give this more stars, I would. I ended up reading this after the movie and while I think it would have been nice reading it before, it certainly filled a lot of gaps that the movie left out and just made me love the story even more. It has the perfect mix of humor and seriousness. The author has an incredible way of making all the scientific calculations and theories understandable for all readers and entertaining. I walked away from the book with a little more knowledge into how space travel works and I think that's so awesome. The characters have my heart fully, they are well developed, personable and hilarious. The story itself is epic, with unlikely heroes that make it feel like anyone can make difference. This truly was a masterpiece and something I will be rereading for years to come. Amaze!!

I just finished Project Hail Mary by Andy Weir, and it’s one of the few book-to-film adaptations where I’m genuinely torn on which version I prefer. The book has a more serious, grounded tone overall compared to the movie, which leans a bit more into humor and pacing. Both are excellent in their own ways.

As someone who thoroughly enjoyed both the book and the film adaptation of The Martian, I went into this expecting a similar balance of clever science, problem-solving, and witty narration. Weir delivers on the first two in spades—Ryland Grace’s journey to save Earth (and his own skin) is packed with inventive hard sci-fi that feels meticulously researched. However, there were stretches where the scientific explanations became way too dense and technical for my taste. I found myself mentally slogging through some sections, which led to many late nights over the 23 days it took me to finish.

That said, the story, characters, and stakes are incredibly compelling, and the payoff is absolutely worth it. It’s smart, hopeful, and emotionally resonant in ways that stuck with me.

I’ll probably need a break from heavy science-heavy reads for a little while after this one, but I still highly recommend Project Hail Mary to fans of smart, high-concept sci-fi.

I consider The Martian my favorite fictional novel of the last 15-20 years. The movie was incredible in that they actually followed the book closer than 99% of other films based on books. It remains my favorite movie of the last 15 years or so as well. I don't know anyone (personally) that loves either of them as much as I do.

With that said, I was REALLY looking forward to Artemis. It was good...but, it was certainly not in the same caliber as The Martian was (at least not for me). I enjoyed it a lot, however and appreciated how author Andy Weir chose to go in a completely different direction and not just rehash another similar story, which I am certain would have been great as well.

As a result, I was cautious regarding Project Hail Mary. It sounded a little too close to The Martian, but yet, also different in that the circumstances simply could not be more opposite and the stakes so much higher. I'm trying to figure out the best way to summarize without giving too much away from this utterly compelling novel. As I read several reviews, I noticed a recurring theme: SCIENCE. Lots and LOTS of science. Holy cow, they were right. Many years ago I read Apollo 13 and Jim Lovell and his co-writer, try as they might, simply could not dumb down Orbital Mechanics anywhere near enough for me to have even a minor clue as to what they were attempting to say...I just skipped 90% of it and hoped that the sentences written afterwards, would help to make sense of what I had just skimmed over. I'm a lot of things, but a math wizard is definitely not one of them. Michael Crichton (Jurassic Park) had an amazing talent for dumbing-down the science of what he was trying to explain in ways that genuinely made sense (most of the time). Not everyone has this talent, and I would say Andy Weir falls squarely in between. He's certainly better than Jim Lovell, but not quite as good as Crichton. But then again, outside of a science textbook, I haven't really read anything with quite as MUCH science as Project Hail Mary. So maybe he's just as good, but he just puts more science into his books than Crichton, maybe that's it...? Either way, be prepared for a lot of astonishingly interesting science within the pages of this novel...and I DO mean a LOT. I don't say this to make you wary or steer you away...on the contrary, Andy Weir has a special talent for making hard science truly entertaining.

The book opens with an absolutely amazing and frightening premise: an astronaut awakes from an induced coma to find the only other two people on board have died at some point along their journey...but it gets worse. He has no idea who he is, or why he's on the ship, and oh yeah, they look to be a long way from home. A really, REALLY long way from home. In fact, the sun he sees isn't actually OUR sun at all. He's managed to leave our solar system entirely. And he has no idea why.

((Minor Spoilers)) The book goes through some clever flash-backs, which set the stage for why the mission happens, and slowly, carefully explains how they managed to get so far away from earth in such a short amount of time. Basically, earth's sun seems to be dying. At the rate of decay, we have maybe 19 years left before the gradual cooling has catastrophic consequences resulting in the death of billions (best guess). Why the sun is dimming is quite the conundrum in the first place. Turns out it really isn't dying, it's being killed by an outside source...which turns out to be easily the greatest find in history. It's alien life, and they are using the sun for food, essentially. It's alien life, but not intelligent life. But still, wow! ALIENS, right???

After this monumental discovery, and some tremendous research done by the most improbable scientist, the investigation into what is happening and why and what to do about it expands exponentially to other nations in order to pool all the resources possible to hopefully save the sun, and by extension, the human race as well. They learn. A LOT. A plan is put together, and with the help of the newly discovered microscopic alien life, which can also double as a power source (along with a few other nifty surprises), they begin to create one last, Hail Mary that could very well be the last chance we might have to save earth. It's audacious. It's dangerous, and it is absolutely critical that it succeed.

As our astronaut's memory slowly unravels, so does his identity: Ryland Grace. He's a teacher on earth. Just a science teacher. Not even a college professor. He's amazingly smart, though. But he's no astronaut...and certainly not one who would volunteer to go on a one-way mission to another solar system to "try" and save humanity. Yet here he is. Alone. light years from earth, trying to solve the biggest riddle in all of human history. Ryland accepts his situation, such as it is, with relative indifference (for the most part). It doesn't matter HOW he got here. He's here now and he may as well use that time to be as productive as possible, right? Along the way, he unravels even more information regarding the microscopic alien life which is slowly dimming our sun during some additional flashbacks. The aliens, dubbed, "Astrophage" are quite the galactic plague as it turns out. Stars all over the galaxy are also losing their light, all due to the little buggers. All that is, except one particular star named, Tau Ceti. Now why would that one star be unaffected by Astrophage, when every single star around it has been affected to some degree. The plan is to go there and figure it out and send the information back, hopefully in time to save the sun before the damage to earth is beyond repair.

There is an incredible amount of stuff going on. The story switches from Tau Ceti to flashbacks of how the whole mission was planned and implemented (which is VERY entertaining, especially Director Stratt, who may actually be my favorite character in the entire novel). Weir is becoming quite adept at building tension, and abruptly switching the story from Tau Ceti back to earth and building more of the backstory then switching back to Tau Ceti. Keeping it all in check and most importantly, interesting all while mixing in a healthy dose of science, which I am to understand is pretty much all genuine, is quite the juggling act. I have long known science can be astronomically entertaining (see what I did there?) when done right...but unfortunately very few people in a position to teach science actually know the best way to create that interest in others. I can say without reservation, Andy Weir definitely knows how to do it...at least in written form.

There is so much I want to say more regarding this truly phenomenal story, but I simply cannot without ruining a lot of the fun and surprises revealed along the way...and it is killing me to keep it locked in. Though I labeled a spoiler warning earlier, I don't think it gave away any more than what the author himself has revealed in interviews he has done regarding the book, and what you can glean from reading the summary here and just a couple other reviews. Tying all of that science together is truly astonishing to me. The creativity to put it into a novel that is remarkably exciting to read is nothing more than incredible talent. Kudo's to Andy Weir for not just hitting a home run, Project Hail Mary is a Grand Slam all the way. I truly did not want this story to end. By the way, I enjoyed the ending quite a bit. I don't know if everyone will. But it was fine for me. I think the ending screams "sequel" at some point too. A lot was left open-ended (IMO) and I wouldn't mind reading a follow-up to this. It doesn't HAVE to happen, but there are a lot of ways where the story could go if Andy chose to do it. Just sayin'.

Just run out and buy this book.

Engaging characters. A unique story. Well told. Well paced. I really have nothing negative to say.

What to expect? A fair amount of hard science, made relatable by the character's perspective. It's sort of a mystery novel but not exactly. It's a "engaging character is faced with an enormous problem and has to solve it"

Not a lot of "action" in the sense of a lot of SF, but a lot of tension and things are always happening to keep you engaged.

I realize that Project Hail Mary already has approximately the population of a small city reviewing it, but I loved this book so much that I want to add my five stars to the pile.

Andy Weir had me at the science.

Actually, he had me at spectroscopy.

I'm a spectroscopist, and discovering that spectroscopy isn't merely mentioned in this novel but plays an important role in understanding what is happening was ridiculously satisfying. More broadly, I loved the way Weir uses science throughout the book. It isn't decoration applied to make the story sound technical. The characters observe, hypothesize, calculate, experiment, get things wrong, revise their hypotheses, and try again. Science is how the story moves forward.

And, remarkably, Weir makes all of that tremendous fun.

The human protagonist is smart without being implausibly infallible. He has flashes of ingenuity and moments of spectacularly ordinary human fallibility. He can be noble and deeply flawed—and, importantly, is capable of being dismayed by his own flaws. That makes him much more interesting than a conventional heroic scientist who always knows what to do.

Then there's Rocky.

What a wonderful creation. Weir makes his alien just human enough that we can form an emotional connection with him, while keeping him sufficiently non-human that we never forget we're encountering a genuinely different life-form. The differences aren't merely cosmetic. Biology, perception, environment, language, technology, and ways of thinking all matter.

And somehow, across all those differences, a friendship develops.

By the time that relationship is fully established, Project Hail Mary has quietly become one of the best buddy stories I've read. Two intelligent beings who shouldn't even be able to communicate gradually learn not only how to work together, but how to understand, trust, tease, worry about, and care for one another.

That's where the book becomes more than a clever science-fiction adventure. Rocky raises fascinating questions about which qualities we think of as "human" that might actually be something more universal: curiosity, loyalty, humor, cooperation, friendship, even love.

Speaking of humor: this book is genuinely funny. Sometimes wry, sometimes absurd, and occasionally laugh-out-loud funny. I know this because I read part of it on an airplane and actually laughed out loud. Fortunately, the person sitting next to me was wearing headphones, so my dignity remained largely intact.

I loved the adventure. I loved the friendship. I loved the imperfect protagonist. And I absolutely loved encountering a science-fiction novel in which the science is not simply scenery but an essential part of the story.

Five enthusiastic stars.

Did I mention the spectroscopy?

For readers who enjoy: The Martian, also by Andy Weir, Contact by Carl Sagan, and The Mote in God's Eye by Larry Niven and Jerry Pournelle—science fiction in which figuring out the science is part of the adventure, and encountering something truly alien gives us a new way of looking at ourselves.

Cocktail pairing: A Moscow Mule — vodka, ginger beer, and lime. Vodka gets its small but memorable nod in the novel, while the copper mug seems entirely appropriate for a book in which materials, chemistry, engineering, and the physical properties of practically everything can suddenly become important.

Besides, after spending several hundred pages trying to save humanity using astrophysics, biology, engineering, chemistry—and, yes, spectroscopy—you've earned a drink.

Just analyze its spectrum before consuming. For science, and, ya know, just in case...

If you watched and loved the movie adaptation, do not skip reading this book! It gives you full access to the scientific problem-solving that makes this story so unique. Weir has a talent for explaining complex science in a way that is engaging, clear, and thrilling to follow along with.

Ryland Grace's internal thoughts keep the story moving fast with lots of laugh-out-loud humor. The relationships feel grounded and real. The bond between Grace and Rocky is at the core of the story. Rocky makes contact first so the characters can shift from strangers to absolute trust.

The other standout character, Eva Stratt, and relationship between her and Ryland is also well done. She does not break her unyielding and legal authority of the planet earth as the administrator in charge of the task force for "Project Hail Mary." Versus Grace's brilliant scientific mind, reluctant to continue but curious, and humorous crisp dialogue personality. His respect for her shines even when recording videos logs to her from light-years away...that is how deeply her authority shaped the mission.

A fantastic read for anyone who enjoys a witty, fast-paced survival tale, optimistic sci-fi, or just wonderful storytelling. Highly recommended! (I hear the audiobook is a must listen...I'm listening now!)

Content: frequent moderate language, with a handful of F-words | 4.5/5 stars

I'm going to need a moment. This book was so good. It had it's flaws, but I was on the edge of my seat the whole time. As someone who never reads syfy, this was such a great introduction. There were two major points that brought my start rating down. First being all the cursing, I'm just not a fan of that in books I read. Second was the constant mention of evolution. I got annoyed after hearing it being talked about 5+ times.

I did like the writing style, it was so easy to get into despite all the science words being thrown around that I didn't understand. The friendship between the MC's was so sweet. I thought the ending was perfect. I went into this story blind, I didn't even read the back of the book. I really enjoyed the cold open & being able to learn about the world around us right along side the MC. I also enjoyed the humor/sarcasm in this book.

I binged this book in 3 days & I'm so glad I read it before seeing the movie. While the movie was good on it's own. Knowing the extra details about the story really enhanced the experience for me. As a visual person, seeing everything come to life in the movie really helped with understanding the story better for me. I had a hard time picturing the control room while reading, so that was helpful.

Fantástica novela de aventuras y ciencia ficción hardcore. Vaya por delante que me encantó The Martian y que disfruté con Artemis, a pesar de no estar a la altura de la primera. El estilo del autor, muy divulgativo, lleno de chistes y juegos de palabras, autocrítica humorística y optimismo en general hace que disfrute tanto del qué como del cómo. (Recomiendo, por cierto, el relato cortísimo de El huevo, del autor. 5 minutos de lectura interesante).

En esta ocasión, a mí me parece que además el autor se supera a la hora de construir el armazón del relato y también a la hora de elegir cómo nos lo va desvelando. La novela empieza con nuestro protagonista despertando en una cama de hospital en un lugar desconocido, sin recordar ni siquiera cómo se llama. A su lado hay dos cadáveres. Y solo sabe que tiene una vaga sensación de que tiene que salvar el mundo. A partir de ahí se intercalan las historias de lo que está pasando y de lo que ha pasado para llegar a ese punto. Me parece que el autor lo hace muy bien.

A los que leímos el Marciano y Artemisa nos sonará el estilo de la historia y del protagonista, pero creo sinceramente que en esta ocasión el autor se ha superado y ha construido una historia que es por momentos muy épica, que tiene una componente científica espectacular (el autor inventa la biología de dos mundos de manera convincente, para empezar a hablar) y que da para una peli épica (presiento que en un par de años o tres volveré a esta crítica y añadiré un "yo ya lo dije").

Por supuesto, tenemos un surtido de chistes y conatos de chistes marca de la casa (algunos están ocultos bajo etiqueta spoiler por si acaso, otros no los pongo porque desvelan demasiado, pero son muchísimos):

Cuando el protagonista aún no sabe quién es ni qué hace ahí:

Ten- foot ladder. I think in imperial units. That’s a clue. I’m probably an American. Or English. Or maybe Canadian. Canadians use feet and inches for short distances. I ask myself: How far is it from L.A. to New York? My gut answer: 3,000 miles. A Canadian would have used kilometers. So I’m English or American. Or I’m from Liberia. I know Liberia uses imperial units but I don’t know my own name. That’s irritating.

Besides, if I had a nickel for every time I wanted to smack a kid’s parents for not teaching them even the most basic things… well… I’d have enough nickels to put in a sock and smack those parents with it.

He disfrutado como un enano, lo reconozco. Tres días duros de trabajo con solo un rato por las noches para leer que he aprovechado hasta el último minuto para leer las 500 páginas. Es exactamente lo que le pido a una novela de aventuras.

I loved this story so much! It was the perfect story for me. Easy to read, great pacing, relatable character (for me), amazing story about overcoming, courage, friendship, adventure and awesome science. Highly recommend.

I absolutely adored PHM. It has everything: adventure, humanity, encounters with alien life forms, suspense, science, and, yes, emotion. I was in awe of the book. What a story. A rather ordinary science teacher is sent to a distant star to save planet Earth and meets an alien, Rocky, who is trying to save his own planet. A beautiful friendship blossoms between the teacher and the alien. It's such a beautiful story.

Not a scientific person myself, I wasn't in the least put off by the science in the book. In fact, it's wondrous.

This will stay with me for a long time. A truc sci-fi masterpiece and a great story, whether you like the genre or not.

I was not crying at the end of last the book, im sure there were ninjas cutting onions close to me.

Seriously, I loved this story. Sometimes it gets a bit too technical, but it's a masterpiece if you like this type of story

The Martian took me 3 days to read, this one I finished in one week mainly because I have a toddler, otherwise I would be done in 4 days for sure.

Great book finish reading 4 times, and decided to support the author with a hardcover copy, recieved in great condition in a nice little amazon box.