Mr. Kaplan's publisher, Berrett-Koehler Publishers, discouraged him from using ResultSource, both the author and the publisher say.

WSJ: Authors Buy Their Way Onto Best-Seller Lists

An interesting new book by Marcia Conner and Tony Bingham, The New Social Learning (Berrett-Koehler Publishers, Sep 2010) covers this topic very well.

FORBES: Are You Collaboration Savvy?

Berrett-Koehler said "Leapfrogging" sold about 11, 000 print copies between August and December 2012, including several thousand outside the U.S. Mr. Kaplan says sales were also boosted by references in various articles and media interviews.

WSJ: Authors Buy Their Way Onto Best-Seller Lists