Start with high-confidence behavioral economics books, then narrow by subgenre or adjacent topics.
Freakonomics Revised and Expanded Edition
Steven D. Levitt, Stephen J. Dubner
Freakonomics Twentieth Anniversary Edition
Who Gets What — and Why
Alvin E. Roth
Assumptions Economists Make
Jonathan Schlefer, Schlefer
The Winner's Curse
Richard H. Thaler, Alex Imas