The Sound Between the Notes by Barbara Linn Probst

What if you had a second chance at the very thing you thought you'd renounced forever? How steep a price would you be willing to pay?
Susannah's career as a pianist has been on hold for nearly sixteen years, ever since her son was born. An adoptee who's never forgiven her birth mother for not putting her first, Susannah vowed to put her own child first, no matter what. And she did.
But now, suddenly, she has a chance to vault into that elite tier of "chosen" musicians. There's just one problem: somewhere along the way, she lost the power and the magic that used to be hers at the keyboard. She needs to get them back. Now.
Her quest-what her husband calls her obsession-turns out to have a cost Susannah couldn't have anticipated. Even her hand betrays her, as Susannah learns that she has a progressive hereditary disease that's making her fingers cramp and curl-a curse waiting in her genes, legacy of a birth family that gave her little else....

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