Mercer Mayer

Professor Wormbog is a very dedicated collector, but he does not collect stamps or coins. He collects the strangest, wildest, and most wonderful monsters in the entire world. He thought he knew everything about taking care of his unique creatures, until one particular monster completely stumps him. The Gloomy Kerploppus is sitting around feeling incredibly sad, and nothing the Professor does seems to cheer it up. How do you make a deeply gloomy Kerploppus happy again? You will have to join the clever Professor as he searches for the perfect cure for his miserable monster. Journey through a fantastically weird landscape filled with odd creatures and hilarious attempts to bring a smile to the Kerploppus's face. This brilliantly imaginative tale is a wonderful exploration of empathy, problem-solving, and the delightful world of perfectly peculiar pets.

The ultimate monster collection is almost complete, but one elusive creature is stubbornly missing. The brilliant and eccentric Professor Wormbog has traveled far and wide to gather an incredible assortment of peculiar beasts, successfully capturing every creature from A to Y. His astonishing zoo is packed with bizarre and wonderful animals, yet his life's work remains unfinished without the final, mysterious Z beast. He sets out on a determined quest to track down the legendary Zipperump-a-Zoo, an animal so rare that finding it seems nearly impossible. Searching high and low, the clever professor looks in all the obvious places, completely unaware of where the sneaky creature might actually be hiding. Join this frantic and funny expedition full of oddball monsters and hidden surprises. You might just spot the final beast long before the distracted professor finally figures it out.