Nick Y El Glimmung by Philip K. Dick

In a futuristic world where Earth is overpopulated and pets are banned, a young boy named Nick and his family decide to relocate to the distant planet of Plowman's Planet. There, Nick hopes to reunite with his beloved cat, Horace, who was taken from him. However, the planet is under the control of the mysterious and powerful Glimmung, a creature with its own agenda. As Nick navigates this strange new world, he encounters bizarre creatures and faces unexpected challenges, ultimately embarking on a quest that tests his courage and determination to save his pet and find his place in the universe.