For what it's worth, that's not really an either/or thing. You should absolutely read the book and start applying DB principles (GAL, detaching from her emotional rollercoaster, etc) regardless of what you choose about confrontation.
Sorry to hear about the rough(er) stretch CT! Just goes with the territory unfortunately.
Also, just a friendly suggestion to stick to one thread for now - it makes it easier for everyone to keep up with your situation and give responses. A mod will probably merge your threads to keep things tidy
Me, WW - Upper 30s BD - Apr 1 2016 EA - Apr 7 2016 (discovered; ongoing for months; did not confront right away) Confronted wife about EA - May 17 Wife sent NC email to OM - July 11