Which parent guide books are helpful?

I’m always on the lookout for useful books to recommend to parents about their seriously ill children. It was a lack of such a book for parents of children in the PICU that led me to write my own book. But my perspective is inevitably skewed by being on the doctor side of the equation; I can’t really see things as a parent does, even though I am one myself. If you know of any particularly good books to help parents of seriously ill children I would appreciate hearing from you about it, especially why you think it is a good book.