Black Box

This thrilling mystery follows Sanford Quest, a brilliant and unconventional detective, as he tackles a series of baffling crimes involving a mysterious black box. The story takes readers through a whirlwind of intrigue, from murder to kidnapping, as Quest unravels a web of secrets that stretches across continents. With each clue and encounter, Quest faces danger and deception, relying on his sharp intellect and unique methods to bring justice. Oppenheim's tale is filled with suspense, twists, and the classic charm of early 20th-century detective fiction.