The demon device: A novel By Doyle, Arthur Conan, Sir and Saffron, Robert (EDT) Books / Hardcover Fiction › Sci-Fi & Fantasy ISBN: 0399122850 / Publisher: Putnam, January 1979 Price $18.77 Free Shipping Send to a friend Used - Very Good With Dust Jacket Very Good condition. Very Good dust jacket. In protective mylar cover. ( spiritualists, world war I, germany, espionage) $18.77 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.