This book, as can be seen even from its name, belongs to the spy novel genre.

A provocateur and a professional anarchist Karl Verloc, hiding under a disguise of a companionable owner of a stationery shop, conducts a series of bombings in London. Detectives manage to find some clues only after the death of Verlok’s wife’s younger brother, whom he asked to deliver a mysterious package to the opposite side of the city.

Illustrated by Andronum.