The Global FlyFisher
Simply the Best Place to go for Online Fly Fishing and Fly Tyinghttp://globalflyfisher.com/review/guide-flies
Klausemeyer's style is impeccable although not very exciting. The book is a catalog of US flies, mainly trout flies for stream use, illustrated with a photo and accompanied by a materials list and a short description of the fly, the guide behind it and a bit about where and how to fish it. Not exactly ground breaking in form or content, but a nice supplement to a fly tying library.