This is a great book and will likely be a great movie. Some parts were really intense even though logically I knew the main character wasn't going to die because I still had a lot of pages left to read. I didn't expect the great sense of humor throughout. It kept the story from being too dry and dull. I couldn't give it 5 stars because of all the math and science. There was a lot of it being a book about space, but I skimmed most of it.