Picture Books That Teach Lessons by Suzanne Santillan author of picture book, Grandma's Pear Tree. My favorite picture book as a child was “Mrs. Twiggley’s Tree” written by the late Dorothea Warren Fox. It was a quirky tale about a terribly shy woman who lived in a tree with her dog and some visiting bears. During the story Mrs. Twiggley rises above her shyness to step in and save others, including those who were the most critical of her. Little did I know that while I was reading this story I was learning a lesson of tolerance and helping others.