Martine Agassi, Ph.D., is a clinical therapist with extensive experience as a behavioral consultant, counseling children and families in schools, residential facilities, foster care, and private practice.

She has led workshops and group counseling in communication skills, parenting, drug and child abuse prevention, divorce, and self-esteem.

Martine, her husband, and their daughter live in Fallbrook, California, with their dog Toby.

Marieka Heinlen received her BFA at the University of Wisconsin, Madison, and also studied at Central Saint Martins College of Art and Design in London.

She launched her career as an award-winning children's book illustrator with Hands Are Not for Hitting and has illustrated all of the books in the Best Behavior(R) and Toddler Tools(R) series. Marieka focuses her work on books and other materials for children, teens, parents, and teachers.

She lives in St. Paul, Minnesota, with her husband, son, and daughter.