Candace has always known that her brothers are a little weird, especially Ferb, who never seems to talk. But after watching an all-night science-fiction movie marathon, she's convinced that Ferb is actually an alien! Can Candace prove her brother is really from another planet? Featuring exciting full-color art from the show, this World of Reading: Level 3 Phineas and Ferb early reader is perfect for fans who are ready to read on their own.