Janusz Piekałkiewicz (1925 – March 9, 1988) was a Polish underground soldier, historian, writer, as well as a television and cinema director and producer. He was an author on many aspects of World War II history. He wrote from his experiences during the war and specialized in detailing operations within the secret services. In addition to his well-known history books, he also wrote books about treasure hunting. Source: Wikipedia (en)