Award-winning authors David Bowles and Guadalupe García McCall join forces to craft a sweeping fantasy romance about falling in love despite all odds. In modern-day Mexico, Sitlali has no family left and has caught the attention of a dangerous gang leader. She has no choice but to make the perilous trip to the US border and track down her long-absent father. The night before her journey, she finds a beautiful conch shell detailed with ancient markings. In 1521, Calizto is an Aztec young warrior in Tenochtitlan, fighting desperately to save his city from Spanish imperialists. With his family dead and the horrors of war surrounding him, Calizto asks a sacred moon…