Awsome book! I really love the pacing in this book, it never dwelled on any boring parts. Although I have no freaking clue on what it was saying about the science stuff (chemical reactions, specific parts of the Hab, and etc.), I still loved it. I actually attempted to look for a website that is dedicated to explaining the space stuff in the book. Haha! I really loved the fact that it was written in multiple perspectives. Some of the humor actually cracked me up. Overall, a great thriller for anyone who wants to imagine being stranded on Mars.