Oathbound (The Legendborn Cycle)

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Author(s)
Age Range
16+
Release Date
March 04, 2025
ISBN
978-1665951906
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Tracy Deonn’s #1 New York Times bestselling Legendborn Cycle continues in the sensational third book about a dazzling contemporary fantasy world that blends Southern Black Girl Magic with secret societies and the legend of King Arthur!

Severed from the Legendborn. Oathbound to a monster.

Bree Matthews is alone. She exiled herself from the Legendborn Order, cut her ancestral connections, and turned away from the friends who can’t understand the impossible cost of her powers. This is the only way to keep herself—and those she loves—safe.

But Bree’s decision has come with a terrible price: an unbreakable bargain with the Shadow King himself, a shapeshifter who can move between humanity, the demon underworld, and the Legendborn secret society. In exchange for training to wield her unprecedented abilities, Bree has put her future in the Shadow King’s hands—and unwittingly bound herself to do his bidding as his new protégé.

Meanwhile, the other Scions must face war while their Round Table is fractured, leaderless, and missing its Kingsmage, as Selwyn has also disappeared. When Nick invokes an ancient law that requires the High Council of Regents to grant him an audience, the Order’s Merlins imprison him. No one knows what he will demand of the Regents…or what secrets he has kept hidden from the Table.

As a string of mysterious kidnappings escalates and Merlins are found dead, it becomes clear that no matter how hard Bree runs from who she is, the past will always find her.

Editor review

1 review
Not the End
(Updated: June 20, 2026)
Overall rating
 
4.7
Plot
 
4.0
Characters
 
5.0
Writing Style
 
5.0
Illustrations/Photos (if applicable)
 
N/A
Oathbound is the third book in the Legendborn Cycle, but not the conclusion I thought it would be to the series. Bree finds out that the King of the Demons is in disguise as Erebus, and he has the knowledge she needs to get in control of her powers. She enters an unholy alliance with him that includes a magical procedure that has her unable to remember anyone in her life, while everything else about her memories remains intact. She grudgingly must learn to work with his cambion wards, Elijah and Zoelle.

With Bree off getting stronger, the POV expands to include Will, Natasia Kane, Mariah, and Nick, so we see how the moving parts of the story are coming together. I liked these chapters where we finally see the story from their perspectives, which helps make them well-developed secondary characters.

My favorite part of the book is Bree’s time at Penumbra, where she has forced proximity to Nick and learns of their past and discovers she wants a future with him. Selwyn Kane is in bad shape as his demon side is dominant now, despite his mother’s attempts to stabilize him. There are many surprise revelations regarding him at the end.

Overall, this book did a fantastic job of developing the characters. Bree now has the knowledge needed to go up against the Demon King and the corrupt Legendborn Regents, which is sure to make for an explosive fourth book.
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