In 'Passers-By' by E. Phillips Oppenheim, the reader is taken on a thrilling journey through the world of espionage and intrigue. Set against the backdrop of early 20th-century Europe, Oppenheim's intricate plot and vivid descriptions immerse the reader in a world of danger and suspense. The book's fast-paced narrative style keeps the reader on the edge of their seat, as they follow the protagonist's quest to uncover a sinister conspiracy. Oppenheim's detailed character development and masterful storytelling make 'Passers-By' a must-read for fans of the spy thriller genre. With its gripping storyline and well-crafted prose, this novel is sure to captivate readers from start to finish. E. Phillips Oppenheim's own background in intelligence work lends authenticity to the story, making it all the more compelling and engaging. 'Passers-By' is a riveting read that will leave readers eager for more from this talented author.