Now presented in two volumes, the second edition of The Handbook of Infant Development reflects the breadth of new topics and vast empirical knowledge relating to infancy research that has emerged in recent years. Updated and fully revised, the handbook provides coverage of all the major areas of interest in infant development relating to both psychological research and applications and policy. Individual chapters across both volumes are written by leading international researchers and practitioners in the field, and provide the most up-to-date theoretical underpinnings and empirical results of the field. Volume 1, Basic Research, covers the basic perceptual processes; social cognition, communication, and language; and social and emotional development. Volume 2, Applied and Policy Issues, focuses on biological and psychosocial risk in infancy; developmental disorders, including autism and intellectual disability; and intervention and policy issues relating to childcare, poverty, assessment and public policy. The editors’ commentary and analysis in the volume introductions, as well as in part introductions, synthesize the material and provide further insight. Together, the two volumes of The Handbook of Infant Development offer the most comprehensive coverage available of this dynamic and rapidly growing field.