Start with high-confidence service industry books, then narrow by subgenre or adjacent topics.
Selling the Invisible
Jeffrey Jones, Harry Beckwith
Implementing Value Pricing
Ronald J. Baker
Managing the Professional Service Firm
David H. Maister, David Maister
GATS 2000
Pierre Sauve, Pierre Sauveu
This Is Service Design Thinking
Marc Stickdorn, Jakob Schneider
