A travel book is about someone who goes somewhere travels on the ground sees something and spends quite a lot of time doing it and has a hard time and then comes back and writes about it. It's not about inventing.
Travel works best when you're forced to come to terms with the place you're in.
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Mark Twain was a great traveler and he wrote three or four great travel books. I wouldn't say that I'm a travel novelist but rather a novelist who travels – and who uses travel as a background for finding stories of places.