GERONIMO STILTON: Paws Off Teenagers Stories Book

Holey cheese, it was strange! 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, I soon discovered the truth: There was a Geronimo lookalike going around, pretending to be me! Worst of all, he was trying to take over The Rodent's Gazette! I had to get that greedy imposter's paws off my newspaper - but how?