Start with high-confidence extreme sports books, then narrow by subgenre or adjacent topics.
Banner in the Sky
James Ramsey Ullman
The Climb
Anatoli Boukreev, G. Weston DeWalt
Into Thin Air
Jon Krakauer, Randy Rackliff
Extreme Edge
Heather Kellerhals-Stewart
The Butterfly's Sting
Abbie Harlow
