The Return by Victoria Hislop

An atmospheric, vibrant and moving tale of pain and passion at the heart of war-torn Spain, from Victoria Hislop, the million-copy bestselling author of The Island.
Beneath the majestic towers of the Alhambra, Granada's cobbled streets resonate with music and secrets. Sonia Cameron knows nothing of the city's shocking past; she is here to dance. But in a quiet café, a chance conversation and an intriguing collection of old photographs draw her into the extraordinary tale of Spain's devastating civil war.
Seventy years earlier, the café is home to the close-knit Ramírez family. In 1936, an army coup led by Franco shatters the country's fragile peace, and in the heart of Granada the family witnesses the worst atrocities of conflict. Divided by politics and tragedy, everyone must take a side, fighting a personal battle as Spain rips itself apart.