Poptropica 3: The Secret Society - Mitch Krpata,

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 finally claimed possession of the confounding map, thwarted the society's attempts to capture him, and is determined to alter the time line. The trio must join forces with the Protectors and find Octavian before he can go through with his evil plot, or all of human history might be changed--or worse--destroyed