A schoolteacher wakes up alone on a spaceship with no memory, and the Sun is dying.
Clever, funny and unexpectedly moving: one of the most fun science fiction novels in years. Four and a half out of five, unless you need lyrical prose or deep literary characters.
Every guide comes as a video and a full written article. Pick the one you need: the review is spoiler-free, the ending explained is not.
Is Project Hail Mary worth reading? A spoiler-free review of Andy Weir's space survival novel, the book behind the Ryan Gosling movie: the setup, the science, the humor, the characters, how it compares to The Martian, and my score.
How real is the science in Project Hail Mary? A fact check of Andy Weir's novel: Tau Ceti and 40 Eridani, Astrophage, light as a rocket, time dilation, the gravity experiments, Rocky's biology, xenonite, and directed evolution.
Project Hail Mary ending explained, with full spoilers: how Grace and Rocky find Taumoeba, the nitrogen problem, the truth about how Grace got on the ship, the xenonite leak, Grace's choice, the rescue, and life on Erid.
Project Hail Mary parents guide with chapter numbers: our own swear count (nine strong words), peril, dark themes, sexual content, science level, the PG-13 film and the age we suggest. No spoilers.
Project Hail Mary book vs movie: what the Ryan Gosling film kept, cut and changed from Andy Weir's novel, from Rocky and the Rockyteers to Stratt, the Earth plot and the new ending scene. Spoilers for both.
Is Project Hail Mary by Andy Weir worth reading? A one-minute, spoiler-free review: the setup, the catch, and my score.
Project Hail Mary is Andy Weir’s third novel, published in 2021 by the author of The Martian. Ryland Grace, a molecular biologist turned junior high science teacher, wakes up alone on a spaceship light-years from Earth with no memory of how he got there, while a microbe called Astrophage dims the Sun.
In March 2026 it became a hit film from Phil Lord and Christopher Miller, starring Ryan Gosling. Below you’ll find the spoiler-free review, a science fact check, the ending explained, and a book versus movie breakdown.
The narrator slowly works out that his name is Ryland Grace. He used to be a molecular biologist, and somehow he ended up teaching junior high science. Now he's light-years from home on a ship called the Hail Mary.
Back on Earth, something is dimming the Sun. A tiny organism the scientists call Astrophage is eating its energy. The models say the planet will cool, crops will fail, and billions will die within a few decades.
The Hail Mary is a one-way mission to a nearby star called Tau Ceti, the only star close to us that doesn't seem to be infected. Grace's job is to find out why, and to send the answer home. The hardcover runs nearly five hundred pages, in thirty chapters, and it moves fast.
The narrator slowly works out that his name is Ryland Grace. He used to be a molecular biologist, and somehow he ended up teaching junior high science. Now he's light-years from home on a ship called the Hail Mary.
Clever, funny and unexpectedly moving: one of the most fun science fiction novels in years. Four and a half out of five, unless you need lyrical prose or deep literary characters. Read it if: you loved the martian; you enjoy smart problem solving and real science; you want a hopeful story about working together. Skip it if: you want lyrical, literary prose; technical detail bores you; you need complex, layered side characters. Review: Project Hail Mary →
Our ending explained covers the final chapters in full, with spoilers. Project Hail Mary ending explained, with full spoilers: how Grace and Rocky find Taumoeba, the nitrogen problem, the truth about how Grace got on the ship, the xenonite leak, Grace's choice, the rescue, and life on Erid. Ending explained: Project Hail Mary →
Project Hail Mary book vs movie: what the Ryan Gosling film kept, cut and changed from Andy Weir's novel, from Rocky and the Rockyteers to Stratt, the Earth plot and the new ending scene. Spoilers for both. Book vs movie: Project Hail Mary →
Children of Time by Adrian Tchaikovsky, A Psalm for the Wild-Built by Becky Chambers.
Yes, it's a clean read. There's some swearing, a few scenes of peril and injury and some grim talk about Earth's fate, but nothing graphic and no romance. It suits a curious thirteen or fourteen-year-old.
The hardcover runs nearly 500 pages in thirty chapters. It is Andy Weir's third novel, published in 2021.
Ray Porter. His audiobook is famous, and parts of the story involve sound in a way that works especially well when you hear it.
Amazon links. We may earn a commission if you buy through them.
