<p>Percy Andreae (1858&ndash;1924 was an English-American brewer and influential anti-prohibitionist during the early part of the 20th century. He was born in&nbsp;Clapham,&nbsp;London&nbsp;to a German father, Carl Andre&aelig; of Frankfurt, and an English mother, Emilie Sillem. During the 1890s, Andreae published short stories and novels, many of which first appeared in&nbsp;The Windsor Magazine. His fiction drew on his roots, incorporating international mystery and suspense with adventure, set in the height of the Victorian era. The hero of &ldquo;The Emperor&rsquo;s Detective&rdquo; series is a British man-for-hire who finds himself working for a very interesting employer, one who has no qualms about assigning him impossible cases.</p> <p>Includes a new introduction by John Betancourt.</p><P>"The Incident of the Wife’s Double and the Tragedy at the Masked Ball" is the fifth of his The Emperor's Detective series.