There are many kinds of quiet:
Quiet can be delicate.
Quiet can be thundering!
Quiet can be sweet, and cozy, and can most definitely help you fall asleep.
The Quiet Book by Deborah Underwood has to be the most ingenious picture book for children I have come across recently. I've been looking for a unique picture book for my friend's son, and this one stood out. I love the concept of introducing young children to look within, rather than out, to contemplate, rather than to want a plethora of things. And of course, I'm sure the concept of "quiet" would be appreciated by the parents! I wish there was a quiet book for adults.