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Project Hail Mary: A Novel

THE #1 NEW YORK TIMES BESTSELLER FROM THE AUTHOR OF THE MARTIAN • Soon to be a major motion picture starring Ryan Gosling, directed by Phil Lord and Christopher Miller, with a screenplay by Drew Goddard

From the author of The Martian, a lone astronaut must save the earth from disaster in this “propulsive” (Entertainment Weekly), cinematic thriller full of suspense, humor, and fascinating science.

HUGO AWARD FINALIST • ONE OF THE YEAR’S BEST BOOKS: Bill Gates, GatesNotes, New York Public Library, Parade, Newsweek, Polygon, Shelf Awareness, She Reads, Kirkus Reviews, Library JournalNew York Times Readers Pick: 100 Best Books of the 21st Century

“An epic story of redemption, discovery and cool speculative sci-fi.”—USA Today

“If you loved The Martian, you’ll go crazy for Weir’s latest.”—The Washington Post


Ryland Grace is the sole survivor on a desperate, last-chance mission—and if he fails, humanity and the earth itself will perish.

Except that right now, he doesn’t know that. He can’t even remember his own name, let alone the nature of his assignment or how to complete it.

All he knows is that he’s been asleep for a very, very long time. And he’s just been awakened to find himself millions of miles from home, with nothing but two corpses for company.

His crewmates dead, his memories fuzzily returning, Ryland realizes that an impossible task now confronts him. Hurtling through space on this tiny ship, it’s up to him to puzzle out an impossible scientific mystery—and conquer an extinction-level threat to our species.

And with the clock ticking down and the nearest human being light-years away, he’s got to do it all alone.

Or does he?

An irresistible interstellar adventure as only Andy Weir could deliver, Project Hail Mary is a tale of discovery, speculation, and survival to rival The Martian—while taking us to places it never dreamed of going.

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Published Oct 4, 2022

496 pages

Average rating: 8.47

2,548 RATINGS

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Community Reviews

KelBel
Jul 30, 2025
10/10 stars
Yes I gave it a 10!! I loved this book!! I'm a geek but to be honest this was my first sifi book in a very long time. I thought the science to story ratio was perfect! I loved Rocky and Grace's relationship. From learning each other's language both "spoken" and body as well as becoming friends it was all just chef's kiss! The science was pretty cool also. I didn't see that ending coming and glad it was an HEA. I had my doubts for a while there.
Lyndsey Ercan
Dec 12, 2024
8/10 stars
Pretty great sci-fi. Definitely an interesting take on alien life and space travel. Some of the science talk might be a little hard to get through, but overall, I enjoyed it.
karen.fahr
Mar 01, 2023
10/10 stars
The best laugh-out-loud, cry-out-loud, and thrilling book I've ever read. It's super entertaining and heartfelt that I still think about it months after reading it. Can't wait to read it again.
Mary Raven
Jan 28, 2023
10/10 stars
I listened to the audio book and enjoyed the book and the performance. Yes, you need to suspend disbelief on how the world is likely to act in a crisis. If only we were likely to manage a cohesive response! Anyway, ignore that and it is fun with physics and unexpected heart.
AFrazier
Jul 30, 2025
9/10 stars
I absolutely adored this book!! Sci-fi reads have never been my go to, but this was fantastic and so well written. Dr. Ryland Grace is a plethora of science knowledge, and has been tasked with saving Earth on a one way trip to space. Turns out, humans aren’t the only intelligent life forms out there. Through shared knowledge, science, failures and triumphs; an unlikely friendship is formed to save the planet. I’m a sucker for anything science, and this was the refreshing read I needed. A feel good story of working together for a common goal. Bravo.

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