Janus - A Modern Telling of Jekyll and Hyde

Avery was a normal girl. She had two brothers, a mom and a dad. She was a straight A student, beautiful, and she had a marvelous British boyfriend. End of Junior Year and every thing was going according to plan, until she's murdered by the love of her life's alter ego, Janus. When her life is ended, another unwanted life begins...
John has been battling his inner demon since he can remember. A lot of people say that, but John actually lives it. John has another person living inside of him, an ancient murderer derived from the deepest depths of fiction. Every one has heard of Hyde, but what they don't know, might just be their undoing. Jekyll went through a series of tests to achieve Hyde, who says he stopped? Janus is Hyde, perfected, and he wants blood. Janus is a new kind of predator; he's smart, inhumanly fast and agile, and he loves the hunt.