King of Battle and Blood
Their Union Is His Revenge.
Isolde de Lara considers her wedding day her death day. To end a years-long war, she is to marry vampire king, Adrian Aleksandr Vasiliev, and kill him.
But her assassination attempt is thwarted and Adrian threatens that if Isolde tries to kill him again, he will raise her as the undead. Faced with the possibility of becoming the thing she hates most, Isolde seeks other ways to defy him and survive the brutal vampire court.
Except it isn’t the court she fears most — it’s Adrian. Despite their undeniable chemistry, she wonders why the king — fierce, savage, merciless — chose her as consort.
The answer will shatter her world.
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Scarlett St. Clair
Scarlett St. Clair didn’t set out to reinvent Greek mythology—she simply asked the kind of questions that myths had left unanswered for centuries. What if Persephone wasn’t a passive figure? What if Hades, the god of the Underworld, wasn’t the villain? From those questions bloomed a literary world where ancient legends are unspooled into something darkly sensual, unapologetically modern, and irresistibly addictive.
A bestselling fantasy and paranormal romance author, St. Clair has cultivated a fiercely loyal readership with her Hades x Persephone saga and its sister series, Hades Saga and Adrian x Isolde. Her work is known for weaving rich mythological lore with contemporary dilemmas—power, consent, trauma, and love—all delivered through prose that simmers with tension and desire. She doesn’t shy away from exploring the gray spaces between right and wrong, nor does she dilute the potency of her heroines. Instead, she invites readers to witness women who claim their own agency in worlds where darkness is both a threat and a source of strength.
Adrian X Isolde
In a world where the line between devotion and destruction is razor-thin, the Adrian x Isolde series unfolds like a dark, enchanted bloom—beautiful, deadly, and impossible to ignore.
Set against a backdrop of blood-soaked thrones and forbidden magic, this fantasy romance plunges readers into a realm where the undead rule, kingdoms fall to fire and blade, and love is a weapon as much as a salvation. At the heart of it all is a defiant mortal queen and the vampire king who was never meant to be her match—let alone her equal.
Adrian X Isolde consists of two books and series is set to expand with the upcoming release of two more books. The current recommended reading order for the series is provided below.

