When Annelise meets dark and seductive Ronan, he promises her a new life-if she has the courage to chance the unknown. Now, she's whisked away to a mysterious island and pitted against other female recruits to become a Watcher-girls who are partnered with vampires and assist them in their missions. To survive and become a Watcher, Annelise has to beat out every other girl, but she's determined to do so, because to fail doesn't mean dishonor-it means death.

Cal Thompson is a carrier of a parasite that causes vampirism, and must hunt down all of the girlfriends he has unknowingly infected.

Fifteen-year-old Zack is quite content living in a mental ward because of his unusual allergies until dark secrets about his past, his parents, and his strange sickness slowly surface, placing him in great danger.

After sixteen-year-old Destiny and her twin sister Livvy are turned into partial vampires at a summer camp, they try to find the "Restorer," someone who can return them to normal.

When twins Connor and Grace's ship is wrecked in a storm and Connor is rescued by pirates, he believes that Grace has been taken aboard the mythical Vampirate's ship, and he is determined to find her.

When multiple murders in Austin, Texas, threaten the grand re-opening of her family's vampire-themed restaurant, seventeen-year-old, orphaned Quincie worries that her best friend-turned-love interest, Keiren, a werewolf-in-training, may be the prime suspect.

Most sixteen-year-olds have friends. Aden Stone has four human souls living inside him: one can time travel, one can raise the dead, one can tell the future, and one can possess another human, and then he meets a girl who quiets the voices.

Sixteen-year-old Raven, an outcast who always wears black and hopes to become a vampire some day, falls in love with the mysterious new boy in town, eager to find out if he can make her dreams come true. 

In Victorian London, after discovering that vampires really do exist and plot to end the human race, friends George, Liz, and Eddie join Sir William Protheroe in an increasingly desperate effort to find ways to stop them from overthrowing Parliament and, eventually, taking over the world.

When his family moves from California to New Sodom, Massachusetts and Cody enters Vlad Dracul Magnet School, many things seem strange, from the dark-haired, pale-skinned, supernaturally strong students to Charon, the wolf who guides him around campus on the first day.