Admittedly, I am mostly a spin fisherman by nature, but reading this book had me practice casting in the backyard in 10 degree weather. The book is very readable and filled with anecdotes and information that obviously resulted from years of field experience.
This is not a location guide, it is a species guide. The author does give general information about where to find a certain species but does not give up any secret holes or mention any locations that might be sensitive to overfishing. What he does give in abundance is his knowledge of each fish species; it's life cycle, the proper flies and equipment to use and most importantly, the presentation for each species. Throughout the book, he gives a sense of mastery gained from countless hours in the field. The chapter on flyfishing for Sockeyes alone is worth the price of the book. He debunks the myth that Sockeyes don't bite flies and lets you know how to present the fly to elicit a strike. I have never wanted to fish the Russian River like I did after reading that chapter.
I'd recommend it to anyone going up from the lower 48. Even if you are an experienced flyfisherman, this will help jump start your success with new species.