The Secret Adversary By Agatha Christie Was Her Second Novel Published In 1922. The Author Introduces To The Public Two New Sleuths Who Appear In Additional Novels. In This Story, The Elusive Criminal Is Unknown Until The Very End A Characteristic Of The Christie Novels. This Technique Maintains A Level Of Interest And Excitement To The Very End. A Review At The Time Of Publication Stated That Mrs Christie Had Certainly Succeeded In Writing A Story Not Only Entertaining, But Ingenious And Amazingly Clever. - Recommended By The Gunston Trust - Classic