Start with high-confidence first aid books, then narrow by subgenre or adjacent topics.
SAS Survival Handbook, Third Edition
John 'Lofty' Wiseman, John Wiseman
The Boys' Book of Survival
Guy Campbell
Water, Fire, Food: Treat Water, Build a Fire in the Rain, Find Food in the Wild
Diane Vukovic
Do Your Best
Bear Grylls
Basic Illustrated Wilderness First Aid
William W. Forgey M.D., William W. Forgey
100 Deadly Skills: Survival Edition
Clint Emerson
The Bushcraft Boxed Set
Dave Canterbury, Ph.D. Jason A. Hunt
Total Survival
James C. Jones
The World Almanac Guide to Getting Out Alive
World Almanac, World Almanac Books
The Ultimate Survival Medicine Guide
Amy Alton
A Girl's Guide to the Wild
Ruby McConnell
Get Ready!
Deb Moller
Joseph Alton, Amy Alton