Many authors have personal websites or biographical information on their publishers' websites. In addition to these, try:
To find text or video interviews with children's authors, try these Google (live link!) searches:
If you decide to use Google to find supplemental biographical information on an author, look for author websites, awards websites, foundation websites (e.g., MacArthur Foundation), a magazine or journal website, or a website from a university or college. You are a scholar in college now, so DO NOT use Wikipedia, websites that are fan pages, or pages created by students for a project.