The 90-Minute Baby Sleep Program: Follow Your Child's Natural Sleep Rhythms for Better Nights and Naps Book

In this book the author goes over the scientific evidence demonstrating how infant sleep happens in 90 minute cycles based on the Basic Activity and Rest (BRAC) cycle. She explains the vital importance of sleep to babies and how to achieve it using the N.A.P.S plan. She gives lots of advice on solving common nap problems.

Hands down my favorite book about infant sleep so far, although I wish I had read it sooner! I love the discussion of what sleep should look like by age. This was really useful for understanding where our daughter should be today and what to expect as she grows. We now understand why our daughter slept great and then suddenly became a terrible sleeper!

I recommend this book for people with kids under the age of one, especially those with young infants. It's helpful to start implementing some of these techniques very early on. This approach is amenable to co-sleeping but not as much as other approaches. Pacifier use is not emphasized and she does advocate the use of controlled crying in some instances.