The Moon's Revenge — Joan Aiken

Seeking to become the best fiddler in the land, a boy angers the Moon, who seeks revenge by making his sister mute, but when a monster threatens the land, it is only the boy's music that can subdue it and restore his sister's voice.

The Moon's Revenge is an eery gothic thriller by Joan Aiken of a young boy, his thirst for music, and the dangers he must overcome to use his gift. A haunting tale celebrating the power of love and the human spirit.