The Violin Maker's Secret by Evie Woods

Baggage claim agent Devlin, retired teacher Walter, and appraiser Gabrielle should have nothing in common, but when a single choice sets in motion a new chapter in the violin’s story, they finally feel a part of something – something that matters, and which makes them matter.

Because as their search for the violin’s origins unlocks a mystery stretching back decades, the instrument teaches them a melody they never expected.