The authors offer great thanks and appreciation to some of the people who helped bring this book to fruition: agent Howard Morhaim and Kim-Mei Kirtland, for finding it a home; editor David Pomerico and Rebecca Lucash for inviting it in and making it comfortable; Erica Wilson and Autumn Chartier, for service above and beyond; Catherine, for inspiration; James Fallon, author of The Psychopath Inside and Dr. Kent Kiehl, author of The Psychopath Whisperer, for information, and our family, for putting up with us.