“The invention never flags.” —Booklist (starred review)

In this third weird and wacky installment of National Book Award winner M. T. Anderson’s Pals in Peril series, Jasper Dash and his friends must unravel a terrible mystery.

It is a land of wonders. It is a land of mystery. It is a land that time forgot (or chose specifically not to remember). Cut off from the civilized world for untold years by prohibitive interstate tolls at the New Jersey border, this land is called: Delaware. It is into the mist-shrouded heart of this forbidden mountainous realm that our plucky and intrepid heroes, Jasper Dash: Boy Technonaut, and his friends Lily Gefelty and Katie Mulligan, must journey to solve yet another a mystery. Come along on a tale of grand adventure that includes in its pages: Lost cities! Tentacles! Monks! Dinosaurs! Cheap suits! Eye Doctors! And, of course, the fabled Curse of the Jaguar!