The Bargainer series by Laura Thalassa

Discreet Bloom Paperback Edition.  Signed Bookplate

Rhapsotic--Book 1:

Callypso Lillis is a siren with a very big problem, one that stretches up her arm and far into her past.

For the last seven years Callie has been wearing a bracelet of black beads up her wrist, magical IOUs for favors she once received. Only death or repayment will fulfill her obligations.

Everyone knows that if you need a favor, you go to the Bargainer to make it happen. He's a man who can get you anything you want … at a price. And everyone knows that sooner or later he always collects. But for Callie, he's never asked for repayment. Not until now. 

When Callie finds the Bargainer in her room, a grin on his lips and a twinkle in his eye, she knows things are about to change. At first it's admitting a truth—a single bead's worth—acknowledging the attraction between them. But the Bargainer is after more than just rekindling their connection. Something is happening in the Otherworld. Fae warriors are going missing one by one, and only the women are returned, each in a glass casket, a child clutched to her breast. 

For the Bargainer to save his people, he'll need the help of the siren he spurned long ago. If she can forgive him.

A Strange Hymn--Book 2:

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.

The Emperor of Evening Stars--Book 3:

Long before he became the infamous Bargainer or the King of Night, Desmond Flynn was a boy clinging to hope, marked for obscurity, and forced to hide his magic and his pain. When everything he loves is destroyed, Des embarks on a relentless quest for revenge, journeying through haunted fae realms and treacherous bargains that test the very core of his soul. This atmospheric novella immerses readers in a world of secrets, heartbreak, and immortal love, offering a powerful, deeply emotional glimpse into how a broken boy becomes a legend. 

With lush worldbuilding and a raw, anti-hero perspective, Laura Thalassa delivers an essential companion story in the Bargainer series. Desmond Flynn is one of the essential book boyfriends for romantasy readers and readers praise this novella for its intensity, heart, and addictive magic. 

Dark Harmony--Book 4:

She's the siren queen with a destiny she never wanted. He's the fae king whose love was forged in the dark. Together, they face a world on the edge of chaos—and a bond that could save or destroy them both.

Callypso Lillis must claim her power as Queen of the Night, risking everything to protect those she loves as ruthless enemies awaken and the line between fate and freedom blurs. Readers praise Callie's unforgettable transformation, the addictive chemistry between her and Desmond Flynn, and the relentless suspense that builds to an epic, emotional finale.

For everyone who's fallen for the fae world, sizzling tension, and high-stakes intrigue of the Bargainer series, Dark Harmony is the epic finale you've been waiting for. Dive back into Callie and Des's world of magic, betrayal, and hope—where every secret matters, every choice has a cost, and love is the fiercest power of all.