Publisher's Synopsis
Authors note
Book 21 finds the children approaching the Mysterious Mountains. The children meet animals normally found in the land of Russia, but then the story takes an unexpected turn of events. The children discover a secret world inside Left-Hand Island called Mystery Island. An unexplored sanctuary to creatures once forgotten. But something seems unsettling in this place and the children soon find out. Will the children get to safety After all it is called Mystery Island. Getting there is one thing, getting out is another.
