The hard science parts are certainly ambitious. The author goes into such topis as oceanic physics, as well as science of the atmosphere
The novel has several twists which I thought were pretty clever. The ending leaves the reader, and Unit Four, in a philosophical conundrum.
Dr. Ryland Grace woke up on a space-ship with no idea why he’s there. His crew-mates are dead and the spaceship is millions of miles from home.
The novel takes full advantage of geek culture, and infantile jokes but the science in this book is fascinating ranging from overall theories to nuts and bolts
Most of all The Martian celebrates human inventiveness to survive. An adventure book celebrating intelligence, done with intellect, wit and full of suspense.