"The Mystery of the Singing Mummies" features the pulp character, Dr. Yen Sin. An oriental doctor who is bent on evil, in the same vein as the pulp character The Mysterious Wu Fang by Robert J. Hogan and Sax Rohmer's Dr. Fu Manchu. 5.5 x 8.5 in size with a full color cover, the book is a facsimile reprint of the original pulp published in 1936.
Donald Edward Keyhoe (June 20, 1897 – November 29, 1988) was an American Marine Corps naval aviator and writer of aviation articles and stories. In the 1950s, Keyhoe became a UFO researcher and writer, arguing that the U.S. government should conduct research into UFO matters, and should publicly release all its UFO files. [Wikipedia]