The Unworry Book
This is such a brilliant book. I would give it 6 stars. My daughter always has it in her hands now and takes it on car journeys where she is engrossed in it. "Every page was useful, it gives me great advise, and whenever I get worried I will use this book."
The nightmare section is particularly relevant for us. This is a great book for the parents and adults as well. It's easy and fun to use.