Continuing on Q's Back Channel drop and other Back Channel notables.

Found 2 more books:

• The Back Channel by William J. Burns (memoir):

https://www.washingtonpost.com/outlook/a-cautious-diplomat-who-couldnt-stop-us-mistakes/2019/03/14/d69fd026-4297-11e9-922c-64d6b7840b82_story.html

• Back Channel by Stephen L. Carter (novel):

https://www.barnesandnoble.com/w/back-channel-stephen-l-carter/1117906473?ean=9780385349604