I try to read a book per week. (Most of the time it is a mystery from Robert B. Parker, Michael Connolly, Daniel SIlva, and the like). I do read business books though. Here are some on my shelf.
Read everything from Seth Godin!
Of course, my book, SELLECOM, about sales and marketing in the Telecom Industry.
Keith Rosen’s books about Cold Calling, Sales Coaching and Closing the Sale are a worthwhile read.
Smart Calling is on the pile to be read.
These are a good start. If you need more recommendations, give me a shout!