"Simple tools that really work!"
- Michelle Pfeiffer, actress/producer
"Roll over, Dr. Spock!"
- The New York Times
"Dr. Karp's work is fascinating!"
- Julius Richmond, MD, Harvard University, former US Surgeon General
"The best way to help crying babies."
- Steven Shelov, MD, editor-in-chief, American Academy of Pediatrics' Caring for Your New Baby
