Start the Week, on Radio 4 from 9am,  on the theme of “Barriers and Crossings”, includes a contribution by Garrett Carr, author of The Rule of the the Land (Faber & Faber), his account of Ireland’s border country. And Book of the Week, also on Radio 4, from 9.45am, is Border: A Journey to the Edge of Europe by Kapka Kassabova (Granta).