The field of child psychopathology and developmental disabilities is expanding rapidly. As a result, many researchers and most clinicians are having greater difficulty keeping up with these rapid advancements. Twenty years ago, psychologists, child psychiatrists, educational counselors, and other child professionals could consult a few journals to obtain current research developments. But this is no longer possible, because the proliferation of specialty journals (e.g., multiple journals on single childhood disorders – such as autism and ADHD) has enhanced the need for more – and more frequent – editions of books specifically designed to summarize the research. Assessment and treatment using evidence-based methods are the proposed topics of this two-volume set.