The Cocoa Commotion — Melissa Peterson

Cuckoo for cocoa!
The mysterious Carmen Sandiego -- the greatest and most elusive thief in the world -- has outdone herself! Carmen and her henchpeople have managed to go back centuries in time to steal the first crop of cocoa plants. And that means chocolate will never exist! In fact, folks in the present have already begun to forget what chocolate is....

ACME's baffled Chief sends junior detectives Maya and Ben back in the ACME time machine to check things out. Their first stop is a Mayan settlement in A.D. 600. From there they follow clues through time to Europe and America ... and even to a moon colony in the future! Can the determined duo stop Carmen before chocolate -- a food that changed history -- is nothing more than a sweet memory?