Children's Books, Movie, Video Game Adaptations, Psychological 

Critically acclaimed author Tanya Byrne returns with a dark, compulsive tale of obsession and betrayal. First love. Last lie. When Adamma Okomma has to leave her glossy high school in New York for a dusty English boarding school, she thinks it's the end of the world - or the end of her social life, at least. Then she meets the wicked-witted Scarlett Chiltern, who shows her all of Crofton College's darkest corners and Adamma realises that there's much more to her new school than tartan skirts and hockey sticks. She and Scarlett become inseparable, but when they fall for the same guy, the battle lines are firmly drawn. Adamma gets the guy but loses her best friend. Then, when Scarlett runs away, Adamma finds herself caught up in something far more sinister than a messy love triangle. Adamma always knew that Scarlett had her secrets, but some secrets are too big to keep and this one will change all of their lives forever. - from Amzon