"The great detective Banana Fox is called back to duty to find a missing turtle. But the deeper he digs, the more he discovers, and it's worse than he thought! The Secret Sour Society is back, and they're mixing up a bunch of trouble. Can Banana Fox and his sidekick, Flashlight, put an end to the Secret Sour Society once and for all?"-- cover page 4.

"In this exciting third installment of the Poptropica series, we find Mya, Oliver, and Jorge in the custody of a secret society whose mission is to protect and preserve Poptropica--a mysterious, uncharted island world. These Protectors, as they call themselves, believe that any outside interference with the islands of Poptropica could have catastrophic results on the course of history in the real world. As if things aren't bad enough, Octavian has...