Among the headliners for this year's Tunbridge Wells Literary Festival will be travel guru and national treasure Michael Palin, discussing his new book Great Uncle Harry: A Tale of War and Empire.

From the time, many years ago, when Michael Palin first heard that his grandfather had a brother, Harry, who died in tragic circumstances, he was determined to find out more about him.

The quest that followed involved hundreds of hours of painstaking detective work. Michael dug out every bit of family gossip and correspondence he could. He studied every relevant official document. He tracked down what remained of his great-uncle Harry's diaries and letters and pored over photographs of First World War battle scenes to see whether Harry appeared in any of them. He walked the route Harry took on that fatal, final day of his life amid the mud of northern France. And as he did so, a life that had previously existed in the shadows was revealed to him.

Great-Uncle Harry is an utterly compelling account of an ordinary man who led an extraordinary life. A blend of biography, history, travelogue and personal memoir this is Michael Palin at his very finest.

Michael Palin has written and starred in numerous TV programmes and films, from Monty Python and Ripping Yarns to The Missionary and American Friends. He has also made several much-acclaimed travel documentaries, his journey taking him to the North and South Poles, the Sahara Desert, the Himalayas, Eastern Europe, and Brazil. His books include accounts of his journeys, novels (Hemingway's Chair and The Truth) and several volumes of diaries. From 2009 to 2012 he was president of the Royal Geographical Society, and in 2013 he was made a BAFTA fellow. He lives in London.