Minor Key by Sara Creasy is book 8 of the Wynter Wild series. It was published June 2020.
Books in the Wynter Wild series:
02 Out of Tune
08 Minor Key
Three years ago, Xay Morant left Wynter to face the nightmare alone. She's been searching for him ever since--and now he's found her first.
But it's not easy to pick up the pieces of a past you're trying to forget. As Wynter and her brothers prepare to head off on tour with their band, Xay needs to figure out where he fits in.
When tragedy strikes this already wounded family, where will they find healing?