 He also contributed both theatre and music reviews to "The Irish Times".Harper became a regular writer of liner notes for compilations of folk, acoustic and prog-rock artists appearing on record labels including Windsong, Demon, Castle, Hux and Snapper.His long-time admiration of Bert Jansch led to his biography of Jansch, "Dazzling Stranger" (its title taken from a song by Alan Tunbridge).