Who Knocks? Twenty Masterpieces of the Spectral for the Connoisseur

August Derleth with Edward Lloyd-Hampton, Wilbur Daniel Steele, Henry S. Whitehead, Mary E. Wilkins Freeman, Lee Brown Coye, Cynthia Asquith, May Sinclair, J. Sheridan Le Fanu, Theodore Sturgeon, Stephen Grendon, Alice-Mary Schnirring, A.E. Coppard, Algernon Blackwood, Ray Bradbury, H.P. Lovecraft, Arthur J. Burks, W. Fryer Harvey, H.R. Wakefield, Edward Lucas White, E.F. Benson, Seabury Quinn