Start with high-confidence shooting sports books, then narrow by subgenre or adjacent topics.
Gunsmithing Modern Firearms
Bryce M. Towsley
The Illustrated Directory of Guns
David Miller
Gunsmithing Made Easy
Shooter's Bible Guide to Firearms Assembly, Disassembly, and Cleaning
Robert A. Sadowski
The Gunsmith's Manual
J. P. Stelle, William B. Harrison
Shotgunning
Bob Brister
Advanced Gunsmithing
W. F. Vickery
The Complete Guide to Gunsmithing
Charles Edward Chapel, Jim Casada
Shooter's Bible Guide to Handloading
Wayne van Zwoll
Gun Digest Book of Combat Handgunnery, 7th Edition
Massad Ayoob
