Lost Melodies by Sara Creasy is book 4 of the Wynter Wild series. It was published May 2019, and in paperback March 2020.
Books in the Wynter Wild series:
02 Out of Tune
04 Lost Melodies
08 Minor Key
Wynter's dreams are coming true: after more than a year in foster care, she finally has the home she always dreamed of when Caleb buys a ramshackle farmhouse on the mountain. Her experience of the world is growing, with Jesse to guide her at every step (even when she'd rather he didn't). She has her first boyfriend, her first job, and a new hard rock band at school.
But one of her brothers is hiding a shameful secret. Just when her hopes of a united family seem possible... he's gone.
And one by one, her other successes are falling apart. How will Wynter cope when her desire for a simple, safe life is under threat?