Edition: First US printing.
New York: Harper & Row, (1964) dj. Hardcover first edition - The fourth Van der Valk novel, set in Amsterdam in the Netherlands. "Cast in the form of a police investigation, this is very far from being a simple whodunit. Beginning as a seemingly minor and squalid inquiry into an outbreak of poison pen letter-writing, it develops startingly into something monstrous." 217 pp..
Condition: Fine in fine dust jacket.