Whenever you need to use his character should be fine.
Not George Lucas personally. He has people who handle that stuff for him. I don't know the exact process.
No
not always, star wars was from a comic book
George W. Bush has written the book "Decision points".
According to IMDB, below, Peter Benchley wrote the book, and as well, collaborated on the screenplay for the movie. Steven Speilberg directed the film; George Lucas was not involved in Jaws.
HOWARD THE DUCK
1984
In most cases, minors can write an adult book because there are no age restrictions on writing. However, publishing a book may require parental permission or involve legal considerations related to contracts and copyrights.
in 1983 and the sign of the beaver got a newbery honor
There are dozens of books by that title, even just within the Star Wars universe. The one with only George Lucas listed as author is Ballantine, 1995.
reading a book
Reading.