I really liked Wallin's Attachment in Psychotherapy. Also there are some good chapters on attachment in Siegel's books Mindsight and Parenting From the Inside Out.

There are a few good journal articles if you have access to a university library, though I'll have to find the citations. 

Helpful Books - although Waterlogged already suggested a couple of the ones on my list. 

This might be heavy reading, and I'll keep trying to find some of the other articles I've read.

This is another good one - it goes over the different attachment styles and then how they influence narratives in therapy.

Thanks Waterlogged, you jogged my memory. Yaku, I would look up "David Wallin" and "John Briere" on Youtube, both of them have talks available. John Briere is an expert on healing trauma and touches on attachment also. I also found a couple of articles I had that I've attached to this post. 

Great interview of David Wallin on Psychotherapy.net David Wallin on Attachment and Psychotherapy

Sorry another good source is Diana Fosha, here's one of her articles on Attachment: Healing Attachment Trauma with Attachment (and then some!)

And last but not least Jeffrey Smith has a new book out on Attachment (*Full disclosure, I contributed a chapter): Attachment to Your Therapist: A Conversation. His blog Moments of Change is also worth checking out. 

Thanks so much!!! You guys are the best. Can't wait to read. Outside of the part where experiencing all this stuff myself is awful, gut-wrenching torture, I do find learning about it so fascinating. And my T seems usually willing to read them too, which has fascilitated our communication on tough or complicated topics before.