As several others have mentioned in reviews, I too was surprised at the format of this book and just how short a time it took to read. Having read and enjoyed one of Andy's other books which was more full-length, this one was not what I expected. It's a little shiny picture book that outlines the basic principle of the "Butterfly Effect" without really going into much depth. But perhaps that's enough to introduce someone to the concept.
International readers might want to note that the book is quite America-centric.
So this is a brief reminder to be aware of your every action because you never know what effect it might have somewhere down the track. In the book, just a few stories are traced back through history, just enough to get you thinking.