Mystery on Cemetery Hill, Paperback

This is a fictional story about a 11 year old girl whose name is Olivia Hudskin. She becomes good friends with the new neighbor girl (Sara Johnson) They are inseperable and do everything together . All through high school but, Sara has a secret . They also go to the same college where Sara starts to decieve Olivia when she finds out Olivia meets a male friend. Olivia doesn't think anything about Sara's behavior yet, untill she introduces Sara to her friend Jack. Sara meets a male friend Nevan when they all become friends and hang out. Sara convinces them all to take a road trip and Olivia's mother has a bad feeling and tells Olivia not to go. They go and end up in Cemetery Hill where it doesn't end well