He has a lot of stuff. I know his work primarily in articles and through people like Philip Bromberg (analysts and therapists) who use his work. The book that probably speaks the most to this is Affect Regulation and the Repair of the Self.

I'm finding Philip Bromberg's work excellent about this stuff. He has a whole theory that uses the neuroscience too but it is more grounded in how to work with people in really detailed ways. The one I'm reading is introduced by Schore and is called In the Shadow of the Tsunami. He means that an early attachment trauma (the tsunami) passes but the person lives in its shadow and that the work of therapy is to shrink that shadow. He does this relationally, meaning he uses the affect regulating parts of the relationship to accept some of this very difficult and hard to bear material and make it a little safer, bit by bit, until the person lives less in the shadow of the tsunami.