Holey cheese, it was strange! All across New Mouse City, rodents kept telling me I'd done things I had no memory of. Was I going crazy? Had the cheese finally slipped off my cracker? No, that wasn't it. I soon discovered the truth: There was a Geronimo lookalike going around, pretending to be me! He'd even fooled my sister Thea. Worst of all, he was trying to take over The Rodent's Gazette! I had to get that greedy impostor's paws off my newspaper,...

After eating ten buns cooling on a tray at the palace, Pignatius causes more mischief when he pretends to be the prince.

Two cats that look alike live in the same building and, when they sneak out to visit one another, worry their young owners by their changed behavior.