3. Travels With My Aunt by Graham Greene

ISBN 0140185011 - The Bodley Head, 1969

Henry Pulling, a retired banker and dahlia fancier, gets a shock at his mother's funeral. His Aunt Augusta reveals that the woman Henry was raised by was not his biological mother. Henry is brought out of his mundane existance by his very colourful aunt who has a chequered past. Journeys to Istanbul by train and to Paraguay by ship, intrigue, time in jail and a murder follow.
Described by Graham Greene as, "the only book I have written just for the fun of it." It was made into a film in 1972 and starred Maggie Smith as Aunt Augusta, Louis Gossett Jr as her companion Wordsworth and Alec McCowen as Henry.