Unconquerable: The Invictus Spirit

is published by Harpercollins (£14.99). To order for £12.99 plus p&p, call 0844 871 1514 or visit books.telegraph.co.uk. Boris Starling will be speaking about the book at the Bridport Literary Festival on Remembrance Sunday, Nov 12. Tickets from 01308 424901 or bridlit.com