My wife received this book recently as a gift.
It is not a book of "solutions" - it is a poorly compiled
collection of research.
There were about 7 pages of "solutions" out of a 304 page book,
which for me is a large waste of time.
This book contains enough contradictory information to support
almost anything you could possibly do to make your child
sleep.
You may as well look up your "solutions" in online forums!