When they were little, Lexi and her identical twin, Ava, made up a third sister, Alicia. If something broke? Alicia did it. Cookies got eaten? Alicia's guilty. Alicia was always to blame for everything. The game is all grown up now that the girls are seniors. They use Alicia as their cover to go out with boys who are hot but not exactly dating material. Boys they'd never, ever be with in real life.
Now one of the guys Alicia went out with has turned up dead, and Lexi wants to stop the game for good. As coincidences start piling up, Ava insists that if they follow the rules for being Alicia, everything will be fine. But when another boy is killed, the DNA evidence and surveillance photos point to only one suspect: Alicia. The girl who doesn't exist. As she runs from the cops, Lexi has to find the truth before another boy is murdered. Because either Ava is a killer…or Alicia is real.
There was one issue I had with the book that was minor but there. Lexi pretends to be Alicia because she feels as Alicia she can be outgoing and flirty and all that kind of stuff AND she feels this is the "better" way to be. That her real self as Lexi isn't good enough for people to really like here. A lot of it stems from the pressure she puts on herself - clearly seen with the whole college drama. I found this aspect of the novel annoying as best but to a very small degree the wrong message to send. Thankfully Lexi's ideas are challenged and she does grow, but I just have to mention that it bothered me.
In the end - good book. Fun fast read.