My Possessive ,Crazy Alpha Mate

Sarah was the perfect good girl , Derek  was a bad boy and also the alpha of the strongest pack in the world the blood moon pack .She thinks she is just a ordinary but little do she know she is royalty. What will happen when these two meet and figure out they are mates?   Sarah is 17  a senior in bolder valley high school ,he is 19 also a senior in boulder valley  high school. Sarah moves to boulder valley when her  dad  died she was only two at the time so she don't remember  him . Sam has been living in boulder valley forever he has never been any where else.