Shadows (Transformers Bayverse Book 1: Optimus x OC)
Rose Witwicky is Sam's sister. Sam gets his A and gets his first car, which everyone assumes is normal. It isn't. There is an ancient struggle between two Cybertronian races, the heroic Autobots and the evil Decepticons, come to Earth, with a clue to the ultimate power held by two teenagers. Also, one of the teenagers...