Blue Sargent has found things. For the first time in her life, she has friends she can trust, a group to which she can belong. The Raven Boys have taken her in as one of their own. Their problems have become hers, and her problems have become theirs. The trick with found things though, is how easily they can be lost.

Uncovering an ancient evil, Serafina, a mermaid of the Mediterranean Sea, searches for five other mermaid heroines who are scattered across the six seas, to save their hidden world.

As they celebrate the opening of their underground nightclub, the Zeroes, six teenagers with unique abilities, learn about the sinister power of Swarm, who uses a crowd's rage to kill--and who loves killing Zeroes.

As the sole heir of Pavan, Aurora's been groomed to be the perfect queen. She's intelligent and brave and honorable. But she's yet to show any trace of the magic she'll need to protect her people. To keep her secret and save her crown, Aurora's mother arranges for her to marry a dark and brooding Stormling prince from another kingdom. At first, the prince seems like the perfect solution to all her problems. He'll guarantee her spot as the next queen...

Blue has been warned that she will cause her true love's death. She doesn't believe in true love and never thought this would be a problem, but as her life becomes caught up in the strange and sinister world of the Raven Boys, she's not so sure anymore.

As Bluejay--Mo's fictitious double--tries to keep the Book of Immortality from unraveling, Adderhead kidnaps all the children in the kingdom, asking for Bluejay's surrender or the children will be doomed to slavery in the silver mines.

No one knows what Nikolai Lantsov endured in his country's bloody civil war. Now enemies gather at his weakened borders, and the young king must find a way to refill Ravka's coffers, forge new alliances, and stop a rising threat to the once-great Grisha Army.

As mysterious murders threaten the new peace between Shadowhunters and Downworlders, only Simon, the Daylighter vampire, can help bring both groups together.

Burdened with the dark, dangerous, and seemingly impossible task of locating and destroying Voldemort's remaining Horcruxes, Harry, feeling alone and uncertain about his future, struggles to find the inner strength he needs to follow the path set out before him.

Sixteen-year-old Clary continues trying to make sense of the swiftly changing events and relationships in her life as she becomes further involved with the Shadowhunters and their pursuit of demons and discovers some terrifying truths about her parents, her brother Jace, and her boyfriend Simon.