Good older book. There is a small triangular piece missing from the top right corner of front cover. Some wear to cover edges and corners. Cover has some discoloration from age. Additional Details ------------------------------ Product description: An invitation to ingenuity. The authors of these sixteen fascinating tales of cod and cipher range from such well-known figures as Edgar Allen Poe and Sir Arthur Conan Doyle, Agatha Christi and Anthony Boucher, to Harvey O'Higgins and Melville Davidson Post. "The Gold-bug", that archetypical cipher story, is here, of course as well as O. Henry's "Calloway's Code" and Edgar Wallace's "Code No. 2". The editor, in an ingenious introduction, reveals an error in Poe's revision of "The Gold-bug" cryptogram and catches Sherlock Holmes committing a grievous and unusual mistake in decoding "The Adventure of the Dancing Men".