It all started when I began wondering where passports came from. I pitched every magazine editor I knew on a story about the history of passports, but no one, and I mean no one was interested.

Fine, I thought. I’ll broaden the concept and make it into a book.

The history of passports eventually became a chapter in my book Wanderlust: A Social History of Travel. The book also answers such burning questions as “Why did 1930s stewardesses carry wrenches?” (Answer: Because the planes’ violent vibrations often shook loose the passenger seats, which were bolted to the floor.)

Back in the early days, just about all travellers “travelled like locals” – from the bureaucrat in ancient China who took 13 years to return from a government mission (partly because he married a local woman and started a family en route) to the medieval pilgrims who sought shelter in monasteries along the way to Santiago de Compostela in Spain.

So how do you enter to win a copy of the book?

Find out @ Facing the Street