Robert A. Heinlein ; introduction by Ken MacLeod. Robert W. Chambers ; introduction by Hugh Lamb. Robert Coover ; introduction by T.C. Boyle. Robert Graves ; with an introduction by Miranda Seymour. Robert M. Pirsig ; [with a new introduction by the author]. introduction by Ken Macleod Robert Graves ; with an introduction by Barry Unsworth. Robert Tressell ; with an introduction by Tristram Hunt.