This book is, most clearly, a labor of that love—love for the subject matter and love for the mentors, Henry and Lila Gleitman. Henry Gleitman has been called the best teacher of the best undergraduate introductory psychology course in the country. Lila Gleitman is an internationally recognized psycholinguist. As a husband-and-wife academic team, the Gleitmans are perhaps most well-known by nonspecialists for their pioneering research on Motherese, the way that mothers all over the world speak to their babies—high-pitched, sing-song, repetitive—and the way this helps the infant brain learn a language. Nineteen contributors, who are themselves recognized contributors and researchers in the fields of memory, learning, perception, and language, were inspired by a 1996 convocation in Philadelphia held in honor of Henry Gleitman’s 100th introductory psychology course at the University of Pennsylvania. This volume is a compilation of addresses from that meeting, as well as essays by former students of Henry and Lila Gleitman, two of the most prominent research psychologists of our time.