Houdini, Harry (Ehrich Weiss). A Magician Among the Spirits. New York: Harper & Bros., 1924. First edition. Publisher's gilt-stamped cloth. Inscribed and signed by Houdini on the front flyleaf: "To Eugene de Rubini/ Best wishes/ Houdini/ as long as you are honest and make no claims as to possessing supernatural I am your friend/ Houdini/ June 11 1926." Frontispiece, illustrated with photographic plates. 8vo. Boards bumped and lightly scuffed; spine nicked upper left; light marginal soiling along the top edge, not affecting signed page. The New York Times reported that De Rubini was "the only psychic ever to receive the public endorsement of Houdini" (March 14, 1927). A native of Czechoslovakia, he exhibited across Europe and the United States and was most famous for his notionally telepathic ability to locate objects hidden by members of the audience in the performance area. Houdini's endorsement suggests De Rubini himself made no outright claims to supernatural ability, which may also explain the interest his displays garnered from scholars and scientists of the day.