In July 1991, the United States was shocked to discover the full extent of serial killer Jeffrey Dahmer’s crimes. But no one was more deeply affected than the murderer’s parents, particularly his father Lionel.

To understand the nature of his son’s psychosis and what drove him to commit such horrors, Lionel Dahmer methodically examines all the factors that may have contributed to his madness. Riveting and heartbreaking, this unprecedented book is the confession of a father who must “face the saddest truth a human being can know—that his child has somehow crossed the line separating the human from the monstrous.”