Persephone's Orchard (The Chrysomelia Stories #1)

The Greek gods never actually existed. Did they? Sophie Darrow finds she was wrong about that assumption when she's pulled into the spirit realm, complete with an Underworld, on her first day at college. Adrian, the mysterious young man who brought her there, simply wants her to taste a pomegranate. Soon, though she returns to her regular life, her mind begins exploding with dreams and memories of ancient times; of a love between two Greeks named Persephone and Hades. But lethal danger has always surrounded the immortals, and now that she's tainted with the Underworld's magic, that danger is drawing closer to Sophie.