Edgar Wallace was an astoundly prolific British writer, born on April 1, 1875, in London. An author of widespread acclaim, Wallace's work encompassed a variety of genres, including crime, adventure, and historical novels. His foray into writing was preceded by a career in journalism, which honed his narrative capabilities and provided him with a deep insight into the criminal underworld that would later become a hallmark of his novels. 'The Man Who Knew' is one of his many works that showcase his masterful storytelling and his ability to weave intricate plots with memorable characters. Wallace is often remembered for his brisk pace and suspenseful writing style, which has made his books beloved by audiences worldwide and perennially popular within the crime genre. With over 170 novels, 960 short stories, and numerous plays and screenplays to his name, Wallace's prolific output made him one of the most read writers in the United Kingdom in the 1920s. His influence extend beyond literature as several of his works were adapted into successful films. Also notable among his creations is the character of King Kong, which he co-created for the screenplay of the iconic 1933 movie, although he passed away before its completion. Wallace's legacy endures, as his books continue to be devoured by those with a penchant for high-stakes intrigue and gallant adventures. He died on February 10, 1932, in Beverly Hills, California, leaving behind an indelible mark on the world of popular fiction.