Writer and broadcaster Mark Ovenden will be mapping out his fascination for cartographical categories when he plans his route to Letchworth’s David’s Bookshop next month.

He’ll be talking about his latest work, Transit Maps of the World, and signing copies at the Eastcheap shop on Thursday, February 18, from 7.30pm.

The book is billed as the first and only comprehensive collection of historic and current maps of every urban train system on earth, and also features striking graphics and achive photographs to trace the history of mass transit. Visit www.davids-bookshops.co.uk for full ticket details.