Originally published in 1933, with this Century Publications paperback appearing in 1946, Van Wyck Mason’s The Shanghai Bund Murders was seventh in a series of twenty-six mostly similarly titled thrillers such as The Hongkong Airbase Murders, The Sulu Sea Murders, and—no one-trick-pony Mr. Mason—The Budapest Parade Murders, because murder happens even outside Asia. All of these starred his spy creation Hugh North, and here Hugh finds a coin—previously carried by an agent who suffered an early demise—that is engraved with a coded message about Chinese military secrets. You get pro forma anti-commie stuff, but the real villains here are western gunrunners. The excellent cover art, which is not related to the text, is by Malcolm Smith.