Anything by Tom Kelly is hard to beat. Good luck on finding an available copy of Tall Timber Gabriel, It's pretty rare and quite pricey if you find one. a few good titles have already been mentioned, so I'll through a couple more into the mix.
Double Gobble / Bobby Dale
Hunting The Wild Turkey / Tom Turpin
Americas Greatest Gamebird / Archibald Rutledge edited by Jim Casada
Mr. Casada has already been mentioned, and he is an excellent source for rare and out of print titles. search Jim Casada Outdoors.
There are many other titles that could be listed. It just depends on your interest. Biology, instructional, or hunting tales. Good luck and happy reading.