by
Jacques Futrelle
Language: English
Release Date: May 1, 2015
In this detective tale from Jacques Futrelle, lead investigator Professor Augustus S. F. X. Van Dusen, Ph.D., LL.D., F.R.S., M.D., M.D.S., also known as The Thinking Machine, comes to the aid of a businessman whose high-value deals are being imperiled by the apparent presence of a spy in his office.