Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My children cried less when I followed Dr. Ferber's method!

As a mother of twins, I had to let 2 babies sleep through the night at the same time. After reading pertinent chapters thouroughly, and checking my instincts, I followed Dr. Ferber's method very closely. In no time at all they were crying less, sleeping more, and I had more energy to love and play with them. They sleep as I write this review. A book to be kept as a reference for years of parenting. Bravo Dr. Ferber.