"A contemporary Buffy" - Publishers Weekly Every other day, Kali D''Angelo is an average teenager. She goes to public high school. She attends pep rallies (reluctantly). She''s human. And every other day in between . . . she''s not. Though she''s not quite sure what she is on those days, Kali knows what she does . . . she hunts, traps, and kills demons, hellhounds, and other supernatural creatures that threaten her world. On those days, she is practically indestructible.But when Kali notices a mark on a popular girl at school, she knows instantly that the girl is marked for death by one of these unworldly beings. And she knows she has only twenty-four hours to save her. There''s only one problem . . . it''s the wrong twenty-four hours.An action-packed supernatural mystery from Jennifer Lynn Barnes, no.1 New York Times bestselling author of The Inheritance Games.