Beautiful Lies by Lisa Unger
Beware of who you trust... When Ridley Jones steps off a New York street corner to save the life of a young child, she is thrown into a whirlwind of violence, deception and fear, and her world is turned upside down. But just as she has a chance to pick up the pieces of her shattered life, another seemingly ordinary act leads her into dark territory she never knew existed, and where she must question everything she knows about those close to her. Forced to hunt down a ghost from the past, Ridley risks everything and learns to trust no one in a race to find the truth before it finds her...