Move over, Captain Underpants! There's a tiny new superhero in town. Undaunted by Principal Krupp's insistence that their essay assignment on good citizenship not be another comic book about the briefs-clad warrior, fourth graders George and Harold decide to invent a new superhero. Super Diaper Baby is born! It's up to our fearless infant hero to save the planet from diabolical Deputy Doo-Doo and his reluctantly evil pooch, Danger Dog ("I'm not really evil. I'm just in it for the kibbles."). Several robotic battles, intergalactic digressions, and "flip-o-ramas" later, Super Diaper Baby has done his duty, and George and Harold are in trouble yet again with their principal. Still, it was worth it, as any fan of Dav Pilkey's lowbrow, scatologically inclined "epic novels" (The Adventures of Captain Underpants, Captain Underpants and the Wrath of the Wicked Wedgie Woman, etc.) will attest. George and Harold's spelling is atrocious, their humor is straight off the grade school playground, and kids love every page of it. (Ages 8 to 12) --Emilie Coulter