Here is a short list of some books I’ve found useful and recommended to my sales teams:
From Vendor to Business Resource, Jerry Stapleton
Raving Fans, Ken Blanchard
Spin Selling, Neil Rackham
Swim with the Sharks without Being Eaten Alive, Harvey McKay
Who Moved My Cheese, Spencer Johnson
Customers For Life, Carl Sewell
Question Based Selling, Thomas Freese
Now Discover Your Strengths, Marcus Buckingham & Donald Clifton
Leverage Your Best, Ditch The Rest, Scott Blanchard
The New Strategic Selling, Heiman & Sanchez
7 Habits of Highly Effective People, Steven Covey
Good to Great, Jim Collins
Winning - Jack Welch
Another great read and too obvious to leave out is:
How to Win Friends and Influence People by Dale Carnegie