The Raven King
Gansey has spent years searching for a sleeping Welsh king in the mountains of Virginia, but the clock is finally running out. His group of friends must face the literal manifestations of their dreams and nightmares to finish the hunt. As the supernatural world bleeds into their own, Blue and the Raven Boys have to decide what they are willing to lose to see the mission through.
This novel is the fourth and final installment of The Raven Cycle and relies heavily on established subplots and character dynamics that are introduced in the earlier books. It is intended to be read as the conclusion to the series rather than a standalone entry.
While this book concludes the original four-part series, the author later released a separate three-book series titled The Dreamer Trilogy that follows some of the same characters.