Title: A Strange Hymn
Description: In the fae world, every bargain has a cost—and for siren Callypso Lillis and the enigmatic Night King, love may be the most dangerous deal of all. 

Still bearing the scars of the Mad King's cruelty, Callie is determined to reclaim her power and uncover the truth behind the Thief of Souls, a threat that haunts the fae realm. By her side is Desmond Flynn, whose devotion is as fierce as his magic, but in the dazzling courts of the fae, nothing is as it seems, and trust is a dangerous game.