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Along with the Skullduggery Island, Astro-Knights Island is another paperback storybook for one of Poptropica's longest islands. The book was written by Tracey West and was released on November 8, 2012.
||In this 160-page illustrated novel, the princess of the Kingdom of Arturus has been kidnapped by an evil inventor named Mordred who has taken her off into space. Our hero now must learn to build his own space craft and travel to the stars on an intergalactic quest to rescue the princess and save the kingdom of Arturus.
|—Poptropica Creators' Blog