Wow! There are simply too many! Off the top of my head.
"The River Why" and "River Teeth" by David James Duncan are very, very good.
The Classic "Trout Madness" by Robert Traver... the classic line "It is not that I think fly fishing is all that important, but rather, all of man's other endeavors are equally unimportant." Or, "A vintage of distinction for peasants bent on extinction!"
In sort of the same vein "Breakfast at Trout's Place" is about local AK fishing and written by Ken Marsh who is still around as a spokesman for the AK State Troopers.
"Fly Fishing Through the Midlife Crisis" by Howell Raines and a couple others by him are good.
John Gierich has quite a few decent entries.
Left out a River Runs Through it... great book and acceptable movie.
