This major reference and text provides the authoritative account of current knowledge on personality disorders, including vital information to guide clinical decision making. Bringing together preeminent authorities in the field, the Handbook synthesizes contemporary thinking about the classification, etiologies, and development of these complex disorders. Diagnostic issues are considered in depth, and available assessment instruments are reviewed and evaluated. The work provides in-depth coverage of all commonly used psychotherapeutic and pharmacological treatments, with particular attention to the empirical evidence for each approach. Special topics addressed include different treatment modalities, such as day programs and group therapy, and forensic issues.