Robert F. Kennedy signed first edition of ''The Enemy Within'', revealing RFK's work on the McClellan Committee which pitted Kennedy against Jimmy Hoffa as it investigated corruption inside the Teamsters. New York: Harper & Brothers, 1960 first edition, later printing. Kennedy elegantly signs the front free endpaper, ''Robert F. Kennedy'' without inscription. Bound in publisher's black cloth boards and housed in original dust jacket with $3.95 price. Some chipping and foxing to jacket, in very good condition. Shelf wear to book, else near fine.