Here is a list of essential reading for any serious Network Marketing Business Owner

Spencer Johnson MD Peaks and Valleys
Brian Tracey Eat that Frog
Mark Yarnell and Rene Reid Yarnell
Your First Year In Network Marketing
Steven R Covey
Seven Habits of Highly Effective People
Nepoleon Hill
Think And Grow Rich
John C Maxwell
Developing The Leader Within You
Anthony Robins Unlimited Power
Bob Burg and John David Mann
Go Givers Sell More