I FLEW through this book! There are books that you 'can't put down,' then there are books that you ACTUALLY CAN'T PUT DOWN. Every time I would get to the end of a chapter and think, okay I'll stop here today, I would see the first sentence on the next page and would be hooked in again. This book is so smart - it really makes you work your brain to understand some of the math and science, but it's great because it never makes you feel inadequate in your knowledge! Mark is laugh out loud funny and I am definitely going to see the film ASAP.