I have been trying to think of ideas for those of you with teenagers and I thought this might be an idea.
You can get the Pretty Little Liars box set of books for $19.79 and shipping is free on a $25 order.
This includes 4 books so it works out to $5 per book. Apparently there are 10 books in total and the rest of them look to be about $8.99 each.
The new season of Pretty Little liars airs in January so the timing is perfect.

I might be in the minority of people, and I do not have any teenagers, but I would not recommend these books for teenagers. I found one of these books in my 17 year old sister in laws room and asked if I could read it since I was bored. I was really shocked all the cheating, stealing, sex, murder, family betrayal, and horrible choices that the teenagers in this book make. Please think twice before giving these books to anyone.
Thanks for the feedback Jenny! I know this is a popular TV series but I am not as familiar with the books.