I ordered a copy of this book, Dinosaurs Divorce: A Guide for Changing Families [affiliate link], because I wanted to review it before recommending it. It’s been around for a long time (copyright 1988) and reportedly has sold half a million copies.
Overall, I think the book does a good job laying out a lot of information and answering a lot of common questions kids will have – and not just about divorce or the process, but about a lot of issues surrounding divorce, from before parents decide to divorce until after the divorce when a parent may decide to start dating again. Amazon says the book is for ages 4-7, but I think it should be a little older than that.
I would also caution there is some content that you might not feel is appropriate for your kids. For example, there is frank and honest treatment of the fact that sometimes parents going through divorce may engage in some self-destructive behaviors (for example, there is a picture of one of the parents consuming an alcoholic drink). But I think the book overall has so much information, and conveys it effectively, that you can simply skip over those parts if you don’t need or want to cover them.
I think the book will give your kids some answers to some questions they have and will encourage them to discuss things with you that they might be reluctant to bring up. At the end of the day, if it can help you open a dialogue with them that might not otherwise happen, then I think that’s the healthiest thing in the world, for all of you.