The authors are a little self centered, dedicating lots of time to explaining their own personal journey. Also, the book tells a rather one-sided account of the story, even playing the conspiracy card more than once! The first half of the book dangles the cyclic model like the plot of a mystery novel, which is frustrating, I kept yelling at the book to get on with it! The science of the cyclic model is NOT explained very well. I was made very uncomfortable by the digression into coincidental points of view found in Greek philosophy, Hindu religion, the Old Testament, and even a science fiction story by Isaac Asimov. Religion in my science book, yuck!!!