The Go-Giver About the Author Bob Burg is a highly sought-after speaker who teaches the principles at the core of The Go-Giver to audiences worldwide. A former top sales professional, he is also the author of Endless Referrals.John David Man has been writing about business, leadership, and the laws of success for more than twenty years. He is the author of The Zen of MLM and co-author of You Call the Shots and A Deadly Misunderstanding.