Captain Underpants. Two Super-Heroic Novels in One

Two Captain Underpants adventures now in full colour! Just when you thought it was over, George and Harold are up to their old tricks again... Our heroes defeated the Bionic Booger Boy but they totally forgot about those rascally Robo-Boogers, plus George and Harold's time travelling Purple Potty lands them in a strange, parallel universe. Watch out for the evil twin lookalikes! Can they handle this mess on their own, or will the Captain need to swoop in and save the day?