Besides Harry Potter I love the Bartimaeus Trilogy, Skullduggery Pleasant, the Septimus Heap books and the Inkheart Trilogy.
What I like about Bartimeaus are the footnotes. They are very funny to read. And Bartimaeus is a really funny character.
The Inkheart Trilogy is a German book series by Cornelia Funke. It is really great. I think it is translated into english, but I'm not sure.
It is sad that I barely read at the moment, because I have so much to do and at the moment browsing through HOL is so interesting