Use these web sites to find the next book in your favorite series.
A great site for all types of fiction in series. Searchable by author, title or series name.
Another comprehensive fiction site covering over 30,000 authors and over 350,000 tities. Searchable by author or title. Each author page will list the author's books in chronological order, as well as all of the author's books in series. Covers all genres.
For mystery lovers. Find the publication order of your favorite mystery series. The site can be searched by author name or by series character.
For science fiction and fantasy readers. The IFSDB is a community effort to catalog works of science fiction, fantasy and horror. The database can be searched by author, title or series.