Escape from Mr. Lemoncello's Library is a children's novel by author Chris Grabenstein. It was on the New York Times bestseller list for Middle Grade novels for 111 weeks between 2013 and 2016, peaking at #8 in hardback and #2 in paperback. Grabenstein has stated that the book contains a secret puzzle that readers can decode. To solve it, he offers some advice given by Mr. Lemoncello in the book: "Forget the Industrial Revolution, my first idea might be your best solution."