Check out these websites to find ideas for your next read.
What's Next™: Books in Series database -look up authors and series
Fantastic Fiction -authors and book information
Stop, You're Killing Me -your guide to mysteries and thrillers
Whichbook -enables millions of combinations of factors and then suggests books which most closely match your needs
Novelist -provides readalikes for series, authors, or titles.
Bookshelf Fantasies - blog whose author reviews a variety of genres and types of books