I will rate this book two ways. First on the book itself (5 stars) and how it works on the Kindle DX latest edition (2 stars).The book.As with most of the authors works this book in filled with good ideas. The book covers in some detail all of the more common aquatic foods for trout. Unlike most other books Whitlock also includes minnows and not just the insects. I have been fly fishing for over thirty years and the one thing I found to be true, big trout eat fish mostly, little trout eat bugs. Most books of this type ignore that fact and stick only to the incests. Some acknowledge the fact and then go on to ignore it as they present only the incest population. This book does not ignore that fact and that alone makes this book worth having.Each species are given a fairly in depth entomological review followed by the imitation and how it is best fished. The detail is at once not a lot but at the same time enough to give both the beginner an easy to follow introduction and jog the seasoned persons memory.I highly recommend this book and enjoyed it very much.The Kindle editionI must take issue with another reviewer who stated that this was a great book on his/her phone. Based on that recommendation I thought if it worked on an e phone it sure as heck would be great on the Kindle DX's larger screen. Sad to say it does not. As anyone who has spent any time with fishing literature a book like this depends on good pictures along with the verbal description to convey the needed information. This book just does not make it at all in the picture category. The art work is very good but somewhat small if not enlarged. This is where this book fails. The larger pictures can take several MINUTES to load. I do not know about others, but I do not have the time to sit and wait fro a picture to load when in the paper edition one need not wait at all.In short I recommend this excellent book in it's paper edition but not as an ebook. This is the first and last time I will purchase a book of this type for the Kindle. I will, however, purchase this book in the paper edition so I can enjoy the art work and the information that it coveys.