I will add this nugget of wisdom, so you may learn from my mistake. Do not try gifting any of these to the other party. No matter how much they could stand to read them. It goes over like a fart in church.
I linked these just in case. I am a devout Amazon book shopper. Prime member? You betcha.
This last one is an incredible resource for the confused or frustrated child. I think kids deserve to know that they have rights. They can ask hard questions and there are ways of answering tough custody questions with responsible answers. It's important.