Harvey Karp

Harvey Karp is a pediatrician and child development expert who developed techniques for soothing infants and helping families with sleep issues. He practices in Santa Monica, California and serves as an assistant professor of pediatrics at USC School of Medicine. Karp gained recognition for his "5 S's" method, which involves swaddling, side/stomach position, shushing, swinging, and sucking to calm crying babies. This approach forms the foundation of his most notable work, "The Happiest Baby on the Block." He founded Happiest Baby, Inc., a company that produces baby products including the SNOO Smart Sleeper bassinet. Karp has appeared on numerous television programs and speaks at medical conferences about infant care. His work focuses on understanding infant behavior through an evolutionary lens, proposing that babies are born with reflexes from earlier stages of human development. Karp applies this theory to develop practical solutions for common parenting challenges during the first months of life.

Parents consistently report success with Karp's "5 S's" technique, with many stating it transformed their ability to calm their babies. Readers frequently mention that the methods work within minutes and helped them gain confidence as new parents. Multiple reviews describe the book as "life-saving" during difficult early months with colicky infants. Readers appreciate Karp's scientific explanations for why babies cry and how his techniques work. Many find his writing clear and practical, noting that the instructions are easy to follow. Parents often mention sharing the book with partners, babysitters, and other family members. Common criticisms include the repetitive nature of the content and the feeling that the core concepts could be explained more concisely. Some readers report that the techniques didn't work for their particular baby. A few parents express concern about the emphasis on swaddling and positioning, preferring approaches that allow more natural movement. Others note that while effective, the methods require practice and don't always provide immediate results.