Emma's foster brother then takes money from their foster mother and frames Emma. Emma wouldn't even need the money because she has a job! Her foster mother doesn't believe her. Next, he shows their foster mother a very strange video. It's of someone that looks exactly like her being choked! "That's not me, I swear!" She exclaimed. But the girl had all of her characteristics so she couldn't defend herself much. The foster mother had no choice but to kick Emma out of the orphanage. Emma is so upset and taken aback, that she decides she might as well take this as a 'Out Of Jail Free' pass and go visit Sutton in Tuscon, Arizona. But there's a twist. Sutton's dead.
Emma visits Tuscon, Arizona and Sutton is missing. She is put in place as Sutton, since they're twins, and encounters many mysteries along the way. Like, betraying family members, and fake friends.
When I first picked this book up, I couldn't put it down. I finished the entire book it 2 or maybe 3 days! I would make time in my day to read this.

This article is well written, and gives the book a great description and quick overview.
Lying Game Article-
The author, Sara Shepard, talks about writing the book and what it's all about. Enjoy!