Why Not?Why Not?

"'Well, you probably won't believe me if I say it's a snake... a huge, child-swallowing anaconda,' said the librarian. A child visits the library with their mum, who tells them to find a book and stay out of trouble. Almost immediately, the librarian warns the child against doing certain things, like climbing the shelves, peeling up the carpet, or taking a particular book. Each time, the child responds with 'Why not?' prompting the librarian to spin increasingly outrageous stories"--Publisher information.