Harvey Karp, M.D., is a nationally celebrated pediatrician, child development specialist, and children's environmental health advocate. He is on the faculty of the USC School of Medicine and a fellow of the American Academy of Pediatrics. Dr. Karp's books and DVDs,The Happiest Baby on the Block,The Happiest Toddler on the Block, andThe Happiest Baby Guide to Great Sleep, teach parents breakthrough techniques to reduce infant crying, boost sleep, build toddler patience, and stop tantrums. Millions of parents have benefited from his advice, including celebrities such as Madonna, Michelle Pfeiffer, Larry David, Jewel, and Pierce Brosnan. Translated into more than twenty languages and taught across America by thousands of Happiest Baby educators, the enormous popularity of Dr. Karp's work has made him one of the most read—and most trusted—pediatricians in history.