One of the problems of writing a book like this is that marriages differ and so do divorces. This therefore hit some spots but not others. I bought all the books on Amazon I could find on this topic and this was the best, however. It seems there are lots for under fives and very few for 5-10 year olds who possibly need it more - my child is 7 and her mother is doing her best to alienate her.
This does introduce some topics which you can expand as it suits you and engages the child. How well it works, however, depends on how well you've thought through the subsidiary questions. It also needs to be selectively used as some bits are a bit trite or America centric.
The best I've found, but not perfect.