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.

When the brother of 16-year-old Maggie Neely disappears, she is determined to find him, never suspecting that the trail will lead her into the Night World, which is ruled by the young vampire prince Delos, who falls in love with Maggie. (Sequels: Soulmate, Witchlight, The Chosen)

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

Beautiful vampire Charlotte finds herself slowly changing back into a human after the mysterious death of her best friend.

In a world where vampires dominate and werewolves are despised, a teen-aged half-vampire discovers his recessive werewolf genes are developing with the approaching full moon.

The summer before ninth grade, when Joss sets off to meet his uncle and hunt down the beast that murdered his younger sister three years earlier, he learns he is destined to join the Slayer Society.

After a lifetime of being a model student, sixteen-year-old Lucy Szabo is suddenly in trouble at school, at home, with the "proto-vampires" she has met online and in person, and most of all with her uncontrolled diabetes.

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.