Book excerpt: Forkhead FOXO Transcription Factors in Development and Disease, Volume 127, the latest release in the Current Topics in Developmental Biology series, provides a comprehensive set of reviews on transcription factors FOXO and their various functions in health and disease. Each chapter is contributed by a leading expert in the field, with specific sections covering Exceptional Longevity: Insights from Hydra to Humans, FOXO in neural cells and diseases of the nervous system, maintaining the equilibrium for better or for worse, and The Role of FoxOs in Bone Health and Disease, amongst other topics. This compilation provides a unique, up-to-date view of this enigmatic, highly evolutionary conserved family of transcription factors with a diverse array of functions in aging and longevity, cancer, and metabolism. - Provides the authority and expertise of leading contributors - Includes sections on the regulation of FOXO factors and stem cells - Presents a unique view of this highly evolutionary family of transcription factors