Since its debut in 1996, DEXTER'S LAB has been one of Cartoon Network's top-rated shows. Now Scholastic teams up with the boy genius and his pesky sister Dee Dee for original chapter and picture booksOh no! Dexter's archrival Mandark is at it again. This time he's come up with a truly nefarious scheme -- he's invented a special helmet that allow him to enter and control Dexter's dreams. The boy genius fights back, and soon he and his evil archenemy are locked into a "dream duel."With all this dream-fighting, Dexter barely has time for his inventions -- or school (he keeps falling asleep in class). There's only one person who can save him now -- his stoopid seester, Dee Dee...