The volume includes Mark Twain's previously published philosophical writing. Fictional pieces (even some which develop arguments contained here) are ordinarily excluded, as are other works appropriate to different volumes in this edition. However, "Letter from the Recording Angel," "The Five Boons of Life," and "Letters from the Earth," although they are in a strict sense fictional, have been judged more relevant to the present volume that to the volumes of short fiction. "Things a Scotsman Wants to Know," previously unpublished, is included by agreement with the editor of The Mark Twain...