In Demystifying Syndromes II , the editors have selected some common and some lesser known syndromes that are associated with persons with developmental disabilities and coexisting mental or behavioral challenges, specifically Autism Spectrum Disorders, as well as Fragile X, Down, Williams, Smith-Magenis, 22q Deletion, Smith-Lemli-Opitz, and Angelman syndromes. Each book chapter provides the reader with an informative and accurate description of the disability, written by individuals with an integrated understanding of how the physical, psychiatric or biochemical influences may interact with the psychological factors (learning approaches, communication, skills) of the individual, as well as with the social-environmental aspects (supports, adaptations, and vulnerabilities).