Charlie Mackesy has created one of the most successful debut books this century - which he never really set out to do. The Boy, The Mole, The Fox & The Horse has gone on to sell hundreds of thousands of copies since its release in late 2019, and has topped bestseller lists on both sides of the Atlantic. On World Book Day, Charlie invited Matt Barbet into the studio at his south London home to exclusively tell the story behind his life-affirming book.