The Lark and the Wren
The Bardic Voices series, Book 1
Mercedes Lackey
Young, brash, and impulsive, Rune backs up a brag by ascending Skull Hill to play fiddle for the malevolent spirit that resides there, striking a bargain with the ghost to surrender her soul if he tires of her playing before sunrise.
Volumes 1-3 also collected and published as The Free Bards.
First published January 1992