The butler did it.
Donald Robertson demonstrates the fruitfulness of connecting Stoic thought to Cognitive-Behavioral Therapy in this detailed and careful book. I think it suffers two main flaws. First is that it downs' quite settle one way or another on whether it is a scholarly work or a work showing a clinical approach to therapy, or even an attempt to reach a popular audience (which seems less the case than the other two). It may fail to reach either audience as a result, which is unfortunate, because as a philosopher and someone who has benefited from CBT, I see great potential for introducing Stoic themes into psychotherapy -- as I had already been doing before I discovered Robertson's work.
The other flaw, as I see it, is that Robertson draws so much from Marcus Aurelius' Meditations, and so little from Epictetus' Handbook (even favoring the Discourses ascribed to Epictetus). That certainly gives a particular slant to his interpretation of Stoicism. I'm not an expert, but an avid reader and a fan of Epictetus, and find the Handbook to have a more austere and in some ways more demanding prescription for life, which makes the adoption/adaption of a Stoic way of life in the contemporary world more challenging.
I've asked Robertson himself about the possibility of this approach with PTSD--which is at the heart of much addiction, I'm convinced--and he has not himself studied the matter. I believe there are potential dangers, because of the lack of a core and centered self that traumatized persons subjectively feel, and the way reason becomes a functional method of coping, not an autonomous form of nous, logos, etc. for people with trauma history. Someone with dissociation, with disconnection with emotion (in contrast to trouble regulating emotion), and who experiences subjective consciousness as series of coping systems lacking a singular core self, could possibly be endangered picking up a Stoic treatise and attempting to follow reason. The question becomes: which reason? Reason as recruited into what coping system? I don't know that a Stoic approach is ruled out, but further study of it would be worthwhile--as further study of trauma as underlying many behavioral health problems always is.