Start with high-confidence service industry books, then narrow by subgenre or adjacent topics.
Competing Against Luck
Clayton M. Christensen, Karen Dillon
Excellence Wins
Horst Schulze, Dean Merrill
GATS 2000
Pierre Sauve, Pierre Sauveu
Sunshine Jobs
Tom Stienstra
The Food and Beverage Magazine Guide to Restaurant Success
Michael Politz
Banking As a Service
Jason Mikula
The Law (in Plain English) for Restaurants
Leonard D. DuBoff, Christy A. King
Inside the Magic Kingdom
Tom Connellan