When Cassia seeks out a Hesperine, he could end her mortal life in a heartbeat. But she has no fear of his magic or his fangs. She knows the real monster is the human king, her father. If he finds out she’s bargaining with his enemy, he’ll send her to the executioner. As a Hesperine diplomat, Lio must negotiate with mortals who hate him. Cassia is different, but politics aren't why she captivates the gentle immortal. He wants more than her blood, and if he can’t resist the temptation, he’ll provoke the war he's trying to prevent.

Lio is an immortal Hesperine, but he's out of time. His Craving for Cassia's blood is killing him while an ancient spell and deadly politics keep them apart. When he learns she is also in danger, he forms a plan that could save them both—or leave the Hesperines defenseless against their mortal enemies.

Cassia has reunited with her beloved Lio in the land of eternal night. She longs to become a Hesperine like him so they can stay together for all time, but she's torn between their happiness and her duty to the kingdom of mortals. To win her freedom, she must convince the humans to ally with the Hesperines despite centuries of conflict.

Lio and Cassia spend their nights in each other's arms but sit on opposite sides of the negotiation table. Their clandestine partnership has brought his immortal kin and her fellow humans close to a treaty after generations of violence. Lives hang in the balance. Failure means war. Peace would bring the future they hope for, one where their love will no longer be forbidden. Just when success is within reach, they realize their plan has played into the enemy's hands. A threat lurks within the delegation, an old nemesis with magic unlike any they have ever faced. 

She's ready for her eternal future with him. But the past won't let them go… The night Cassia has fought for is here. At last, she'll drink Lio's blood and join him as an immortal Hesperine, fulfilling their Grace bond. Then, an unexpected guest returns to Orthros with a revelation about the past she never imagined. Secrets lay hidden in the illustrious Empire, where she must travel with Lio to find the truth.

An ancient magic will put their love to the ultimate test. When Lio brought Cassia to the land of their allies, he believed nothing would threaten her or their fated Grace bond. But a nameless enemy has ensnared her in a conspiracy reaching as high as the Imperial Court. With the Empress out for...

Can she claim her magic and her fangs? Ancient magic is sleeping inside Cassia. Wielding it is her birthright, but her bloodright is to become an immortal Hesperine like Lio, her Grace. Until she masters her dormant magic, it's too dangerous for him to transform her. To claim both her legacies...

Her Grace is in danger—and her fangs are ready for battle. Cassia has risen from the ashes of her human life as a Hesperine with magic the world has never seen. The Gift of immortality from Lio seals their fated Grace bond and frees her from the ancient necromancer known as the Collector. But...

Two wounded souls. One marriage between enemies. No turning back from immortal magic... Lady Maerea has watched her bloodline's feud with a rival house destroy her family, her people... her. She'll do anything to protect what she has left. Their sworn enemy is at the castle gates, and she has...