Lock and Key  (English, Paperback, Dessen Sarah)

Ruby is used to taking care of herself. But now she's living in a fancy new house with her sister Cora - a sister she hasn't seen in ten years - and her husband Jamie - creator of one of the most popular online networking sites. She's attending private school, wearing new clothes, and for the first time, feels the promise of a future that includes college and her family. So why is she so wary? And what is Nate - the adorable and good-hearted boy next door - hiding behind his genial nature? As Ruby starts to see, there's a big difference between being given help, and being able to accept it. And sometimes, in order to save yourself, you've got to reach out to someone else.