Since 2004, Dr. Book has been involved in a volunteer capacity on the executive board of the patient advocacy nonprofit group the American Partnership for Eosinophilic Disorders (APFED), serving as the board’s President since 2009. At APFED, Dr. Book has led the education efforts for patients and doctors, initiated the research grant program and worked on a number of advocacy issues including National Eosinophil Awareness Week, NIH report language, the NIH Task Force on the Research Needs of Eosinophil-Associated Diseases (TREAD) document, formula coverage and development of ICD-9-CM codes for 4 eosinophilic gastrointestinal diseases. As President of this organization, she assisted in development of a research Grant program which has awarded nearly $1.5 million in research grants to date. Her efforts have led to collaborations with other patient advocacy groups, physicians, medical societies, and federal agencies and overseen development of numerous patient education programs. Her experience as a parent of a chronically ill child, and as a physician, provides a unique perspective on the patient experience and challenges involved in navigating the medical system.