Well, there are many hundreds of interviews out there, but the best and quickest source for much of that stuff is the Dreaming website, at www.holycow.com/dreaming, where Puck and Lucy Anne have assembled an incredible resource of all that kind of thing. I did a quick look for the page to point you to, and it looks like the link at the site is broken right now, so I found a google cache of the relevant page.
Some of the works mentioned are linked to from the article. Others aren't -- but look in your school library. Many schools have the various Gale Research volumes, Something about the Author and the rest of them.
The google cache refernce is here: