Harry Houdini twice-signed first edition of his book about his namesake, ''The Unmasking of Robert-Houdin''. New York: The Publishers Printing Co., 1908. With an interesting inscription upon the front free endpaper, ''To Edward J. Doherty / This is the first authentic book on the subject magicians and magic - / Regards / Houdini / Aug 17/1925 / my first real book. / H''. Book runs 319pp., bound in brown cloth boards measuring 5.75'' x 8.25''. Wear to cloth boards along top edges, and front joint starting, else very good condition.