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
Harvey Penick's Little Red Book
Harvey Penick, Bud Shrake
Thinking in Bets
Annie Duke
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