One Blood Ruby
The gripping finale to Melissa Marr’s lush return to faery, Seven Black Diamonds
Now that Lilywhite Abernathy is the heir to the Hidden Lands, everything is about to change.
The Queen of Blood and Rage wants Lily to help broker peace with the human world, but Lily knows that harmony won’t come easily. After decades of waging war on the humans, who cost the queen her firstborn daughter, the fae are struggling to accept Lily, a half-human monarch. And the humans, while no match against faery affinities, will hardly agree to the queen’s détente without resistance.
Lily wants to be a fair ruler but fears having to abandon the life she’s known to do so. Now that she and Creed are more than just fellow Black Diamonds — operatives for the queen — her priorities have shifted. But her worries about assuming the throne are derailed when it becomes clear that someone — or some fae — is masterminding violent attacks to discourage peace.
In this gripping follow-up to Melissa Marr’s lush Seven Black Diamonds, Lily and her friends are forced to reckon with the truth of their own parentage and to protect one of their own, no matter what — or who — comes between them.
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Melissa Marr
Melissa Marr is a master of weaving the dark and beautiful together, creating stories that pulse with magic, mystery, and a sense of foreboding. Known for her immersive world-building and compelling characters, Marr's books often explore the blurred lines between the supernatural and the human world. Her works delve into themes of desire, power, and the consequences of choices—capturing the essence of human complexity, no matter how fantastical the setting.
Born in the U.S. and a lifelong lover of mythology and folklore, Marr’s storytelling has been shaped by her fascination with the unknown and the fantastical. Her debut series, Wicked Lovely, introduced readers to a richly crafted world of fairies, where the boundaries between light and dark magic are never as clear-cut as they seem. The series’ popularity skyrocketed, earning her a devoted following and securing her place as a significant voice in YA fantasy. Marr’s talent lies in her ability to take well-worn tropes and twist them into something fresh, combining romance, danger, and mystery in ways that keep readers on the edge of their seats.
Seven Black Diamonds
Seven Black Diamonds consists of two books. The current recommended reading order for the series is provided below.

