I haven't read The Martian, but Shipwreck by Charles Logan is one of my greatest hidden gems. Not well known at all, I have never heard anyone talk about it. I picked it up for 25 cents at a senior's home garage sale, on a whim and loved it.

The basic plot is that Tansis crash lands on a planet in deep space, the others have died in the accident, and the book starts shortly after the last crew member but him dies. The planet is hostile, filled with a specific plant that has dominated with no signs (at first...) of animal life, and the atmosphere at first doesn't seem safe to breathe. It's a story of isolation, trying to survive, trying to escape, and coming to terms with one's situation. It feels very real, without being extravagant, engaging writing style, and I never quite knew what would happen next even right up to the satisfying (but perhaps not for everyone!) ending.

I really hope you read it, but if not that's okay :)