I read this book because I wanted to see the movie and I always try to read the book first. I will admit, in the beginning, I was nervous that it was going to be the book equivlent of watching the movie "Gravity" with a lack of action, and for the first part, i was sure I should have just watched the movie. 
 However, I was wrong. As the book moved on, the story began to unfold. I loved how details about what has happening on Earth, in space and on Mars unfolded based on Mark's expanding sphere. It was engaging and interesting, even when it was boring. Now I can't wait to see the movie!