[Jamaica, New York: Conrad H. Ruppert, 1933-1935.]. Octavo, seventeen parts plus preliminaries, the parts and the two preliminary leaves professionally bound in black cloth. First edition. COSMOS, a legendary collaborative novel by eighteen authors, was published in seventeen parts as supplements to SCIENCE FICTION DIGEST (later FANTASY MAGAZINE), July 1933–January 1935. In order of appearance, contributors were Ralph Milne Farley, David G. Keller, Arthur J. Burks, Bob Olsen, Frances Flagg, John W. Campbell, Rae Winters, Otis Adelbert Kline and E. Hoffmann Price, Abner J. Gelula, Raymond A. Palmer, A. Merritt, J. Harvey Haggard, Edward E. Smith, P. Schuyler Miller, Lloyd A. Eshbach, Eando Binder, and Edmond Hamilton. The title page (designed by Hannes Bok) and table of contents were printed with the final issue. In 1946 Sam Moskowitz estimated that only thirty complete sets of COSMOS existed. [Reference: Moskowitz, The Immortal Storm (1974), p. 16. Pavlat and Evans, Fanzine Index (1965), p. 19].

Providence, RI: The Grandon Company, 1949. Octavo, cloth. First edition. The third in the Venus series. First published as a serial in Weird Tales in 1932.

Chicago: A.C. McClurg & Co., 1930. Octavo, pp. [i-iv] v-x [xi-xiv] 1-322, original decorated green cloth, front panel stamped in brown and blind, spine panel stamped in brown. First edition. First published as a six-part serial in Argosy, 2 August - 6 September 1930. The second of the three Grandon of Venus novels. Swordplay and fantastic adventure in an imitation of Edgar Rice Burroughs. [Reference: Bleiler, Science-Fiction: The Early Years 1242. Clareson, Science Fiction in America, 1870s-1930s 473. Locke, A Spectrum of Fantasy, p. 129. In 333. Bleiler (1978), p. 115. Reginald 08320].

New York: Avalon Books, [1960]. Octavo, cloth. First edition. An Earthman exchanges personalities with an ancient Martian and pursues a vicious criminal who seeks to destroy Martian civilization. First published as a six-part serial in ARGOSY WEEKLY in 1933.