<p>E. Phillips Oppenheim's 'The Seven Conundrums' is a testament to the literary prowess of one of the early 20th-century's archetypal writers of espionage and crime fiction. Presented in a special edition by DigiCat Publishing, this novel extends beyond mere plot to become a complex labyrinth of mystery and cunning reminiscent of classic detective stories. The prose is characterized by Oppenheim's signature blend of tight narrative and richly pa...