Contemporary:  Teenage Angst Books - Lots of good book lists here.

Graphic Novels - No flying, no Tights; a website reviewing Graphic Novels for Teens

Historical Fiction - Listed by date. A listing by one library of their collection, but a good representation to consult.

Holocaust - Books and Websites about the Holocaust for YAs.

Horror Sites - Dark Side of the Net; DarkEcho Horror - complete and totally revised in May 2002; Horror Writers Association - provides reading lists, links, and lists of present and past Bram Stoker Award winners and nominees.

Mysteries for Young Adults - provides an excellent listing of links.

Romance Reader - for those who like to read of love!

Series - Keep track of what comes next! 

What's next?  Teen series and sequels, arranged by title and author - An excellent list provided by Bettendorf Public Library Info Center. 

What Should I read Next? - from Betsy Simmons, a librarian at the Richmond Heights Memorial Library in Missouri.  Arranged by genre.