For a good discussion of mentalization therapy, the book "Attachment in Psychotherapy" by David Wallin was very useful for me. It's written for therapists working with clients with attachment difficulties (not that I know anyone with attachment difficulties ), but I found it really useful as a client.

I have a DBT workbook, and I find it useful. I'm not BPD but I do have/had C-PTSD and can relate to a lot of it, particularly distress tolerance training. I can't handle DBT groups, though.