THE HAPPIEST BABY reveals a secret used for centuries by the world's top parents...the calming reflex. It is almost an "off switch" for your baby's crying and an "on switch" for sleep. With just a little practice, you'll calm most crying fast...and add 1-3 hours to your baby's sleep! For over 30 years, Dr. Karp has taught his remarkable techniques to over a million parents, from working moms to superstars like Madonna!