Bruce D. Perry, M.D., Ph.D., is the senior fellow of the ChildTrauma Academy (www.ChildTrauma.org), a not-for-profit organization based in Houston that is dedicated to improving the lives of high-risk children, and he is an adjunct professor of psychiatry at the Northwestern University School of Medicine in Chicago. He is the author, with Maia Szalavitz, of The Boy Who Was Raised as a Dog, a bestselling book based on his work with maltreated children.