For fans of Sabaa Tahir and Adrienne Young, the first book in a powerful, page-turning YA trilogy set in a future dystopia in which two girls hundreds of miles apart are bound by songlight, the forbidden ability to telepathically communicate.

Were two songs joined. And theres a word for that. A harmony.

Elsa is used to hiding the most important parts of herselfher feelings for Rye, her distaste for a world ruled by men, and most crucially, her gift of songlight. She buries that secret deep inside. In Brightland, those with songlight are called Unhumans and are abhorred. If discovered, they either become a Siren, using songlight to trap others with the ability, or go to the Chrysalid House, where their songlight, and their brain, will be destroyed. Rye is the only other person Elsa has known with songlight, and their shared bond has brought them together.

Elsas world begins to fall apart one desperate, heart-wrenching day and she doesnt know where to turn, until a girl appears before her. But the girl isnt really thereher songlight has been drawn to Elsas frantic grief.

Elsa lives in a remote seaside village; Nightingale, her new friend, lives in a city hundreds of miles away with her father, a government official responsible for rooting out Unhumans. The two never expected to connect via songlight. But when they do, and when they realize the extent of their power, theyll be thrust in the middle of a war that threatens their very existence.