The continuing adventures of Shark Boy and Lava Girl. Second in a series of original young readers novels featuring the heroes of the movie, co-written by directory Robert Rodriguez and World Fantasy Award-nominated author Chris Roberson, with illustrations by Alex Toader, conceptual designer on the Spy Kids movies and The Adventures of Shark Boy and Lava Girl. RETURN TO PLANET DROOL continues Shark Boy's and Lava Girl's adventures on Planet Drool, picking up where the movie The Adventures of Shark Boy and Lava Girl left off.