Start with high-confidence first aid books, then narrow by subgenre or adjacent topics.
Build the Perfect Bug Out Bag
Creek Stewart
Survival!
Colin Towell, D.K. Publishing
Basic Illustrated Wilderness First Aid
William W. Forgey M.D., William W. Forgey
The World Almanac Guide to Getting Out Alive
World Almanac, World Almanac Books
Survivor Kid
Denise Long
The Ultimate Survival Medicine Guide
Amy Alton