Agatha Christie is the most widely published author of all time, outsold only by the Bible and Shakespeare. Now, in this fascinating travelogue of the prolific author's yearlong trip around the British Empire in 1922, Christie provides the clues to the origins of the plots and locales of some of her bestselling mystery novels. Containing never-before-published letters and photos from her travels, and filled with intriguing details about the exotic locations she visited, The Grand Tour is an important book for Agatha Christie fans, revealing an unexpected side to the world's most renowned mystery writer.