Music and Mirrors (cursed Hearts #2) by Candace Robinson

 Candace delivers again. In her first book, Lyrics and Curses, we see Lark and Auden fighting to survive against a curse that will steal their souls. In the sequel, we see the reflection of that story and dive into the other dimension and the real reasons for the curse.

The two antagonists, Leni and Ridley are from the dimension on the other side of the mirror, and they have no choice but to fulfill the curse. However, they find a clue that might help them break the curse forever, but they will first have to convince Lark and Auden to help them.

With music of the 1980s as a stimulus, this story jumps dimensions to bring a satisfying tale of oppression, greed and hope.