Book excerpt: Parasomnias can be roughly divided in Non-REM disorders and REM disorders, and this issue covers much of what is known today on the diagnosis and treatment of various types of parasomnias. Articles examine disorders such as sleepwalking, sleep sex, sleep violence, sleep eating, and diagnostic methods of these. The issue also delves into Forensic concerns, especially with regard to sleep violence. Other types of parasomnias discussed include sleep talking and sleep enuresis.