Jupiters a Travel is a good call. Pottering round the world on an old Triumph! Ted Simon also wrote a follow up about 30 years later when he retraced his journey, but I didn't ever finish that - it was pretty feeble and felt a bit like he was trying to cash in on the first one! Maybe the newer bike and newer era just didn't feel the same - and it felt as if he thought that too from the things he wrote.