Jane Nelsen, Ed.D., coauthor of the bestselling Positive Discipline series, is a licensed marriage, family, and child therapist and an internationally-known speaker. Her books have sold more than two million copies.** Cheryl Erwin, M.A.**, was a licensed marriage and family therapist in Reno, Nevada...

Jane Nelsen, Ed.D., coauthor of the bestselling Positive Discipline series, is a licensed marriage, family, and child therapist and an internationally-known speaker. Her books have sold more than two million copies.** Cheryl Erwin, M.A.**, was a licensed marriage and family therapist in Reno, Nevada, for more than twenty-five years. She is the author or coauthor of several books and manuals on parenting and family life, and she is a popular international speaker and trainer.Roslyn Ann Duffy founded and codirected The Learning Tree Montessori Childcare and has written adult and children's texts, as well as the internationally circulated column "From A Parent's Perspective." She is a parent to four and besotted grandma to three, and lives in Seattle, Washington.