If you want to check what other books your favourite authors have written, and in particular, keep track of books written in series, try
Fantastic Fiction:
Bibliographies for over 30,000 authors.
Information on over 350,000 books. Throughout the site, just click on a book to see its cover picture, description and publication details
Where possible each entry includes author photo, new and forthcoming books, series, novels, anthologies, short stories, awards, links to authors' Web sites, author recommendations, links to searches in UK and US bookshops for the particular author, and "Visitors to this page also looked at these authors" lists.
Sanity check: I don't know who owns and operates this site, so I don't know what degree of authority its entries have. But it looks right, our local library uses it, and it's a valuable resource for book lovers.
Sample pages:
Screenshot of Fantastic Fiction home page:
