Badger the Mystical Mutt and the Enchanting Exchange by McNicol and Jackson
The Big Top has a spectacular attraction: a real live minotaur! But the minotaur wants to return home, and Pogo Paws is homesick for his childhood circus family. The minotaur's labyrinth is in a parallel universe called Esterious, and Pogo Paw's circus is far, far away, and to return would mean abandoning Pickle.
Can Badger, with his makeshift magic and a little help from a solar eclipse, open the portal in the Crystal Cave, and make the Enchanting Exchange happen? Or will Pickle sabotage Badger's attempts, and make it impossible for Pogo Paws and the minotaur to ever find their way home?