A series is defined as “two or more books linked by character, settings or other common traits”. Readers are constantely challenged by which book came first. Many readers like to read an author’s books in the order in which they were published. Some readers follow a particular character and like to know which book came first etc. The following resources are usefull in identifying books in a series:
What’s Next? Kent County Library (MI) http://www.kdl.org/libcat/WhatsNextNEW.asp
This database is searchable by author and series title.
Fantastic Fiction http://www.fantasticfiction.co.uk/
This is a UK product. Readers can search by author or browse by author. You retrieve a short biography of the author and their titles organized by series and/or date of publication.