Not many, because most books don't have illustrations. When you write an adult book, if it does need illustrations, the publisher assigns an artist to do the artwork, not the author.
She didn't illustrate any of her books (as far as I know, at least).
Writers write about what they like.
they write and illustrate their own books
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God directly wrote no books but He inspired all of the writers of the Bible.
I am not sure what you mean, but they wrote books. In the Renaissance books were published and people began to read.
Most of them. There are very few authors who illustrate their own stories, and they're going to be the children's authors who write picture books.
You are never too old to write -- many writers started after they retired!
The author Diana Hacker writes books which offer a range of hits and tips for aspiring authors and writers. Her books include 'Rules for Writers' and 'A Writer's Reference with Exercises'.
A writer can have a good career if they can write books for a living. They can also work at newspaper offices.
Russel lee and James lee
Writers write on paper.