About the book: 2017 / Friends Lelya and Petrik, living in Zerkalnaya Bay, decide to go in search of a sea monster that has released a thick fog over their village and scared away all the fish in the bay, so the fishermen have to swim further and further from home for their catch. But finding the monster is not so easy! After all, in the mysterious caves under the Giant Mountain, other magical creatures still live - trolls, vampires, giant mountain snails and a green-haired naga mermaid…