Guy Stagg’s The Crossway (Picador), about his walk from Canterbury to Jerusalem in the hope of mending himself after mental illness, is currently Book of the Week on Radio 4. The author will be in conversation with Jason Goodwin — traveller, historian and creator of the Ottoman sleuth Yashim — at the Marylebone branch of Daunt Books, in London, next Thursday (June 28). They’ll have more than a little in common: Goodwin walked from Poland’s Baltic coast to Istanbul for his portrait of Central Europe, On Foot to the Golden Horn.