It's Miles and Niles's final year at Yawnee Valley Science and Letters Academy, and the Terrible Two have one goal: an epic prank. Something big, something brilliant, something that will leave a lasting legacy at their school. Which should be easy-peasy for these experts, especially now that their principal has gone from archnemesis to pranking prot g . But their smooth sailing gets downright bumpy when they find out that the new superintendent is none other than Bertrand Barkin, their principal's father . . . and their sworn enemy. Now that Former Principal Barkin is Acting Superintendent Barkin, he has a first order of business: his long-promised revenge on the Terrible Two. This rollicking finale to the bestselling series by Mac Barnett and Jory John will settle once and for all who--between quick wits and powerful fists--will have the last laugh.