Tough topic, but something some kids have to deal with.
It's an unpleasant topic, but it's definitely something that there are kids going through who need help coming to terms with it. I've seen this book in lists of "Bad Children's Books," like, ha ha, parents going to jail, but I think it treats the subject in a very respectful manner.
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It's okay to feel upset that your parent is going to jail, and it's not your fault.