"When a leopard goes missing at the San Diego Zoo, it's up to Dink, Josh, and Ruth Rose to find her!"--

Dink, Josh, and Ruth Rose investigate the theft of a great deal of money from the belly of a nearly life-size Tyrannosaurus Rex model that their friend, Jud Wheat, is using to raise money for a dinosaur museum.

"Mr. Paskey, owner of the Book Nook, plays an April Fools' Day prank on Dink, Josh, and Ruth Rose. They hatch a plan to get back at him, but then the bookstore is robbed--no joke! Can the kids track down the crook? Or will this April Fools' be an April fail?"--

Dink, Josh, and Ruth Rose investigate possible crime at a summer camp, search for treasure in Plymouth, Massachusetts, hunt for the President's missing dog in Washington, D.C., and have a spooky experience during a sleepover in Sleepy Hollow.