The monograph has continued the long-standing tradition of providing a detailed profile of the treatment court field within the United States. Especially noteworthy is that the data enable the authors to monitor trends and highlight similarities and differences in the findings over time. The monograph also provides a summary of the most recent scholarly literature on treatment courts. Summaries of the extant literature for each type of treatment court include an overview of the history and structure, best practice standards, guiding principles, effectiveness and cost-benefit findings, and directions for future research.