There is a recurring problem with American authors: apparently a writer must produce a minimum number of pages in order to publish a book, even when the core ideas can only fill half of them. In this case the mix is: 30% description of the great idea on how to test evolution by "recreating" a dinosaur starting from a chicken; 50% repetitions of the same idea over and over; 20% irrelevant and boring descriptions of marginal details. IMHO reducing everything down to a 100 pages would make this a perfect book. It's like mixing half a glass of Bordeaux with half a glass of water. You can't avoid thinking how much better would be enjoying the pure wine, without the water!