S.
My pediatrician recommended the book, Healthy Sleep Habits, Happy Child. It was WONDERFUL!!! It takes you from infancy through college. I followed this book, and my daughters (10.8) are still excellent sleepers. They can fall asleep on their own (at home, at parties, at sleep-away camp). It makes day to day life much easier (no over-tired children), and makes traveling a joy. Many people underestimate the importance of sleep. It is vital to a child's development.
I have seen the book at Barnes and Noble -- it might be at the library. It is truly worth the investment.
Good Luck!
S.