A Terrible Thing Happened, by Margaret M Holmes. This book is about helping children to process trauma. The main character is a raccoon, who has seen a terrible thing, that upset and scared him. He decided not to think about it, but eventually started having physical and emotional effects. His parents took him to someone who could help him figure out his feelings, who played with him and encouraged him to draw pictures, then talked about them. He felt stronger, and much better. At the end of the book are notes for parents and caregivers. Nice simple language, and general enough to be used in many different difficult situations.