<human>:  I have a question about the book The Terrible Two: A Tale of Two Toddlers. Where does the title come from?
<bot>: The title comes from the book’s subtitle, which is a reference to the biblical story of Jacob and Esau. The book is about two toddlers, Jacob and Esau, who are very different from each other. Jacob is a good boy, while Esau is a bad boy.