In 2000 Keeley contributed a chapter on CIA-Foreign Service Relations to the book, "National Insecurity-U.S. Intelligence After the Cold War", a work recommending reforms of the CIA, published by Temple University Press for the Center for International Policy. Also in 2000 Keeley edited a book for the American Academy of Diplomacy entitled "First Line of Defense-Ambassadors, Embassies and American Interests Abroad" that advocates greater reliance on and better funding for American diplomacy in conflict resolution and protecting our national security. Keeley also edited two yearbooks for the 50th reunion of Princeton's Class of 1951 in the year 2001. In 2010 Keeley published the book "The Colonels' Coup and the American Embassy: A Diplomat's View of the Breakdown of Democracy in Cold War Greece". Keeley died after an apparent stroke in January 2015.