"Image makers, Image takers" by Anne-Celine Jaeger on Thames&Hudson is great and has interviews with art buyers etc as well as with top photographers like Mario Sorrenti.
"Fashion and Advertising" by Magdalene Keaney on Rotovision covers it and asks prominent photographers like Solve Sundsbo, Jason Evans, Warren Du Preez/Nick Thornton Jones.
Both are very direct, honest and free from 'fluff'.