This was the situation confronting Professor Augustus S. F. X. Van Dusen, aka The Thinking Machine, in "The Problem of Cell 13," one of the most famous "locked-room" mysteries ever written. Eventually The Thinking Machine did escape, and his method is known to generations of fans. Less well known, however, is the fact that Jacques Futrelle wrote many other stories about this unique detective. This volume presents twelve tales of The Thinking Machine, adventures that concern a perfect alibi and a perfect accusation, an impossible theft of a container of radium, a precise sealed room mystery, a flaming phantom, and other "impossible" situations. Rich in Edwardian period flavor, the realistic tales anticipate many of the major developments in modern crime fiction.