Readalikes
If you enjoy books by a particular author or in a certain genre, you may wish to explore similar books.  Christchurch Public Libraries have put together a great list of "readalikes".

Or, try the following database and websites for ideas:

Fantastic Fiction
Contains over 15000 bestselling author bibliographies with all the latest books, covers and descriptions.

Gnooks
Discover new writers you will like, travel the map of literature and discuss your favourite books and authors.