Dr. Augustus S. F. X. van Dozen is the world's greatest detective. His precise mind is called a "thinking machine", and he declares that there is nothing in this world that cannot be solved by logic, and he successfully escapes from an impossible prison!

From the detective stories of Dr. van Dozen, the same famous detective as Holmes, "The Perfect Jailbreak" and "The Extra Finger" have been carefully selected.

In addition to them, "The Maracot Deep" a masterpiece from Conan Doyle's later years, and "Face in the Hand", a horror short story by Jiro Kuwata, are also included in this volume.