Start with high-confidence baseball coaching books, then narrow by subgenre or adjacent topics.
The Inside Game
Keith Law, Rhett Samuel Price
Winning Fixes Everything
Evan Drellich
Where Nobody Knows Your Name
John Feinstein
I'm Keith Hernandez
Keith Hernandez, Little, Brown & Company
Rickey
Howard Bryant
Homestand
Will Bardenwerper
Aces
Mychael Urban
The One Minute Golfer
Ken Blanchard, Kenneth H. Blanchard
I'm Fascinated by Sacrifice Flies
Tim Kurkjian, George F. Will
Game of Edges
Bruce Schoenfeld
The Tao of the Backup Catcher
Tim Brown, Erik Kratz
The Book of Joe
Joe Maddon, Tom Verducci
The MVP Machine
Ben Lindbergh, Travis Sawchik
A Damn Near Perfect Game
Joe Kelly, Rob Bradford