Michael A. Tompkins, PhD, ABPP, is a licensed psychologist and board certified in behavioral and cognitive psychology by the American Board of Professional Psychology. He is the co-director and co-founder of the San Francisco Bay Area Center for Cognitive Therapy, Assistant Clinical Professor at the University of California at Berkeley, and an adjunct faculty member for the Beck Institute for Cognitive Behavior Therapy.

He is the author or co-author of 12 books, including My Anxious Mind: A Teen's Guide to Managing Anxiety and Panic (with Katherine Martinez) (Magination Press, 2010), which is a Magination Press best seller and included in the Reading Well for Young People initiative sponsored by the Wellcome Trust, London, United Kingdom. Dr. Tompkins serves on the Advisory Board of Magination Press, the children's imprint of the American Psychological Association. He lives in Oakland, California.

Chloe Douglass works in her home studio to create illustrations, character designs, and story ideas. She graduated from Kingston University with an MA Illustration degree in 2012. She lives in Tooting, London.