Lilly

So, I'm writing this book and I need a title. The book has three main characters, Sarah Mazey, Jack Moore and Abbey Lawson.

Basically it's a summer vacation and Sarah and Jack are best friends, but they've only known one another for just over a year, and they have planned to stay in a holiday home for a few days but Sarah's plans are ruined when Jack invites Abbey along too, who is Jack's crush.

Sarah becomes jealous and tries anything to get rid of her. Suddenly, Sarah's personality changes.

Also, Abbey does some research on Sarah and finds out that Sarah has been missing since she was nine years old and that her real name is Sarah Cassidy.

When she tries to tell Jack he doesn't believe her but Sarah over hears and she suddenly snaps.

Now, Abbey and Jack starts fighting for their lives as Sarah tries to kill them.

There's a twist at the end aswell but all I need is a possible title for this.

Also, you find out that she killed her parents and that through out the years she has been befriending boys and tries to make them fall for her but she always fails because people like Abbey gets in the way so Sarah kills them and moves on to the next city and starts all over again.

Thanks to anyone who helps. :-)