Zupfgeiger, you'll appreciate this little story. When I was teaching at UVA I would stop on my way to class at a small coffee shop for a macchiato made slightly different than normal. The barista told me the only other customer that wanted a macchiato made that way was John Grisham. So, one day I went in after class to get a cafe for the road and John Grisham was in ordering his macchiato. There was recognition that we had ordered the same drink and I told him I had just read his last book and told him I couldn't imagine how he had written the flight scenes unless he was actually a pilot. He grinned and said he had gotten his license a few years ago and said, 'You ought to do that.' He was appreciative that I had read his books and most gracious.
PS, I'll have to get this latest book