I Had the pleasure of having breakfast with Zig in Denver about 10 years ago. A nicer man you never met and a dynamic public speaker. His books on Sales training like see "you at the top" are classics.
He was truly a G.U.T.S. Salesman and realized that sales was the Million Dollar Skill. Zig could command fee's up to 50K for a 45 minute speech.The bottom line was that Zig was just a nice man.