A brand new adventure in the hilarious series for 7+ readers from bestselling author Rachel Morrisroe, packed with laughs, heart and superhero pets! When a spaceship crash-lands outside of Rebecca Refractor's school full of aliens who look just like adorable hamsters, she knows there is only one kid and Superpet that can help . Jack and Hercules the hamster, the superstrength Superpet! The alien-hamsters can control minds and are determined to turn everyone on Earth into cracker-hunting zombies! But why are the aliens so cracker obsessed? And who (or what) is The Big Cheese - the villain boss the aliens serve? Full of friendship, fun and silly superhero antics, this is the perfect series for fans of The Naughtiest Unicorn, Wigglesbottom Primary and The Secret Life of Pets!.