Start with high-confidence casino games books, then narrow by subgenre or adjacent topics.
Picking Winners
Andrew Beyer
Ainslie's Complete Guide to Thoroughbred Racing
Tom Ainslie
A Beginner's Guide to American Mah Jongg
Elaine Sandberg, Tom Sloper
Bid Better Play Better
Dorothy Hayden Truscott
Confidence Game
James McKimmey Jr.
Losing Big
Jonathan D. Cohen