Anne Rooney writes non-fiction for children and adults, and fiction for children. She has written more than 100 non-fiction books, many of them on topics in science and technology. She has also taught at the Universities of Cambridge and York, and has been a Royal Literary Fund Fellow and Lector.

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.