The Adventures of the Cat and the Kitten. Book 3. Journey to Medverogoburg

Pryanik and Imbirka are at it again! The cat and the kitten rush to the Hidden World to investigate an incredible mystery: the collection of magical artifacts of the witch-dragon Verba seems to have dissolved into thin air, and the... entire forest is covered with some mysterious slime! In search of the source of the slime, Pryanik and Imbirka visit familiar and unfamiliar places, including…
…the Mursal Ocean…
…the Bul-Bul Swamp…
…and unexpectedly find themselves in a secret tunnel that runs under Medverogoburg, an important city of the Hidden World.
Deep underground, the kittens learn about the treacherous scheme of a new dangerous enemy. Will the brave fluffballs manage to bring peace back to the Hidden World, or will this magical land remain buried under a layer of slime forever?