James Bond meets Sherlock Holmes in this classic, high-octane, spy thriller. When the police can't find the evidence to put away master criminal Caesar Valentine, there's only one man for the job. Number Six, a secret undercover agent that operates outside the law. The only problem is, nobody knows who Number Six is, not even Scotland Yard... This action-packed page-turner will keep you hooked until the end. A must-read for fans of James Bond, Alfred Hitchcock, and John Buchan.