Dr. John Townsend is a psychologist, popular speaker, and cohost of the nationally broadcast New Life Live! radio program, and a cofounder of Cloud-Townsend clinic and Cloud-Townsend Resources.

He has written or co-written 27 books, selling over six million copies, including the bestseller Boundaries. He is also the author of Boundaries with Teens and Hiding from Love.

He and his wife, Barbi, live in southern California. They have two grown sons.

Diego Vaisberg is a designer and illustrator who previously worked in the product and design department of the Ink-co kids' accessories brand. He is also a professor of editorial design and illustration at Palermo University, Buenos Aires, Argentina.