Other people, including me, have written books with main characters who were old and rich. Or old and brilliant. Old sages, old wizards, old rich people.

It may be far in the future, but there's some kind of logical way to get from where we are to where the science fiction is.

I like the Beatles, of course, but that's when I grew up.

There are relatively few science fiction or fantasy books with the main character being an old person.

Normal' is a dryer setting.

I can become very emotional about math, although I'm not that good at it.

I used to not back down from a challenge.