Start with high-confidence running books, then narrow by subgenre or adjacent topics.
Endure
Alexander Hutchinson, Robert G. Slade
Win at All Costs
Matt Hart
Racing the Clock
Bernd Heinrich
The Front Runner
Brendan O'Meara
Born to Run
Christopher McDougall
What I Talk About When I Talk About Running
Haruki Murakami
The Athlete's Way
Christopher Bergland
Running With Sherman
Ultramarathon Man
Dean Karnazes
Lonely Planet Epic Runs of North America
Allison Burtka, Stephanie Case
How Bad Do You Want It?
Matt Fitzgerald