It's the first of April in Green Lawn! 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?

The alphabet may be over, but the mysteries continue in this ninth A to Z Mysteries Super Edition, featuring a 26-letter secret message hidden in the illustrations.