Those last two books of Bertrand Russell's career—Unarmed Victory (about the Cuban Missile Crisis and the Sino-Indian war) and War Crimes in Vietnam—both written in the tenth and final decade of Russell's life—are both oddball entries in his oeuvre that share a number of eccentricities in common.
I won't say they are my favorite Russell books. They are missing some of the wit and wry humor that are so conspicuous and delightful in the middle phase of his career (though there are still flashes at times of both in the books).