This is a book about friendship. It's about being brave even though you thought you weren't. It's about loneliness and hope and sacrifice. This is also just a fun book about a man on a space adventure with no memories of who he is or what he is doing there. Lots of science that is interesting, because you can actually understand it. Characters that will make you love them and worry about them a LOT. Can't say much more without giving spoliers (which you should avoid as best you can); Read this if you're into SciFi. Read this if you have never read a SciFi book in you life. Read this if you just want something fun. Read this if you want something to make you think a bit. You won't regret it, I promise :) (Also, watch the move. It's really good)