Working as I do in a bookstore, I am several times a day asked imponderable questions such as, "What's the fourth book in the Dragonlance series?" or "What is the latest Sweet Valley High book?"
Until very recently I've used a combination of Google and bluster to answer these queries, but no longer. The invaluable database What's Next? Books in Series allows me to search by author, title, series name, and so on. And all the answers are grouped by series, so I can appear learned and informed and helpful.
This miracle of the internet is here.
Thanks to the Swiss Army Librarian for the catch.--David E