The concept of the "mastermind alliance" was introduced by Napoleon Hill in his timeless classic, "Think And Grow Rich." He wrote, "No two minds ever come together without thereby creating a third, invisible intangible force, which may be likened to a third mind." Learn how mastermind groups can acclerate your business growth by providing focus, accountability, support and feedback. Karyn Greenstreet has been running successful mastermind groups since 1994.