by Jeanine G. Coleman, Bethesda, MD, Woodbine House, 2006, 457 pp, Paperback, $21.95. A third edition of the Early Intervention Dictionary, by Jeanine Colman, is an essential companion to understanding early intervention (EI) services. The author's aim is to “identify and comprehensively define EI terminology, making it accessible and understandable to parents and all professionals.” As such, this book draws on the expertise of individuals in a wide array of disciplines, including osteopathic and pediatric medicine, physical therapy, and occupational therapy. With the aid of an Advisory Board, the author marshals her extensive background in child development to provide an important resource for EI professionals and a helpful guide for parents. This book follows the usual dictionary format, acting primarily as a reference tool. Entries are listed in alphabetical order, with all except the most common words within a definition also defined. For example, Cystic fibrosis is defined as “an autosomal recessive disorder characterized by abnormally thick mucous secretions, which contribute to chronic lung damage, and a lack of enzymes needed to break down and absorb fats, which causes malnutrition. Cystic fibrosis is a serious illness that nearly always shortens a child's life expectancy.” All italicized words have their own entries with additional italicized terms, allowing the reader to pursue as much or as little information as is needed. There are some features that set this guide apart from information that could be found in a medical dictionary or on the Internet. First, the author directs readers to related information with the inclusion of “Refer to” items at the end of definitions. Similarly, “Compare” notes are used to link terms that are the opposite of, or otherwise contrasting to, a defined word. This tool allows the reader to begin with the definition of a single term, such as “Intrauterine Growth Retardation,” and then find more information on definitions of birth length, birth weight, and head circumference, in addition to growth charts provided in an appendix. The appendices provide the second unexpectedly helpful feature. In addition to the aforementioned growth charts, appendix entries include metric conversion tables, an Apgar scoring chart, information on nutritional intake and stages of standard feeding for infants, and recommended immunization schedules. Despite this wealth of information, the author intentionally excludes in-depth information on the various conditions, limiting scope to meet the goals of clarifying frequently used terms in EI services and providing a starting point in the search for more detailed information. Definitions included in the Early Intervention Dictionary are drawn from the disciplines of pediatric medicine, child development, early childhood education, early childhood special education, physical therapy, occupational therapy, speech and language therapy, audiology, counseling, social work, child life, education of the hearing impaired and visually impaired, and special education. Entries were chosen on the basis of reviews of current articles and literature, medical, therapeutic, educational, and psychological reports on individual children, and discussions with students and professionals working with infants and toddlers in EI programs. The entries are defined specifically, as they apply to the population of young children (0–5 years) who receive or transition out of EI services. This facilitates understanding by both EI professionals and parents by excluding accurate but unrelated information related to older children or adults. In addition, this third edition includes new or updated information on autism spectrum disorders, mental illness and neurological issues, sensory integration dysfunction, and transitioning from EI to special education services. The Early Intervention Dictionary is an essential reference for EI offices. As the author correctly points out, individuals who join an EI team are rarely knowledgeable about all the disciplines that make up comprehensive home-based services; this book provides a basis for shared understanding by EI staff. Providers may also consider bringing this guide along on home visits, as some families do not have computers or Internet access. Although this book would be helpful for families with very medically involved children, it does not provide enough in-depth information on specific conditions to warrant a purchase for the majority of families who use EI services. Overall, however, the Early Intervention Dictionary provides a concise, child-focused guide to understanding the medical conditions and risk factors associated with EI services. April D. Chang, MPA, MA Heller School for Social Policy and Management Brandeis University Waltham, MA Candace Chang, MSW Bay Cove Early Human Services Dorchester, MA