As early as when he was five, Prabhu Ghate appears to have been bitten by the travel bug. By age seven, he had already undertaken five ocean voyages and spent three days on a flying boat. The luxury of being able to travel so widely at such a young age is, of course, a function of the privileged circumstances he grew up in. But admirably for Ghate (who went on to study in the UK, join the IAS and travel to many parts of the developing world in the line of duty), he later pretty much forsakes the accoutrements of privilege and seeks out the rough road, the better to savour the travel experience. By Thumb, Hoof and Wheel is an extraordinary account of his travels over nearly 70 years, to some pretty outlier spots around the world, by hitchhiking, on horseback, by car, by train, by riverboat, by ship&mdashand, when unavoidable, by plane.