I just finished this book, by Kiera Van Gelder. It's new, and I was able to get it at my library so you probably can too.

I just wanted to recommend it, I loved it and I think it could be really interesting to people who aren't borderline and/or are in other types of therapy. It's about the author's struggle with borderline and her experience with DBT.

Just really highly recommend it, I'll be purchasing my own copy soon!