Spy Dog: Gunpowder Plot: Volume 12 (Spy Dog #12)

Mr. Big is on the loose. He's planning a final crime that will make him the most famous criminal alive: blowing up every prison in the country! Lara and her spy team have their noses to the ground and know something evil is coming. Lara follows the clues to London and Big Ben's clock tower, where the explosives are set. With help from the spy pups and spy cat, can she stop Mr. Big once and for all . . . before the clock strikes?