See Jane Run, by Hannah Jayne

See Jane Run took a while for me to get into, but once I got into it I was hooked! The beginning of the novel just seemed a little contrived to me and I almost gave up on it, but I'm glad I didn't. 

See Jane Run is about a girl named Riley Spencer who has overprotective parents - way overprotective. They won't let her go anywhere without them; she even has to bribe them to go on a school-sponsored college tour. One day, Riley and her friend Shelby find a mysterious birth certificate that belongs to someone named Jane Elizabeth O'Leary. Riley has no idea who this person is, or why her parents would have her birth certificate. This makes Riley begin to question everything she's ever known - she doesn't even know if she can trust her parents. 

Riley vows to find out the truth about Jane O'Leary, and encounters some serious trouble and even a kidnapping along the way. She finally finds out the truth - but will she like what she finds?

Also Try: How to Save a Life, by Sara Zarr; Girl, Stolen, The Girl Who Was Supposed to Die, by April Henry