Now, if it's fantasy/adventure you're looking for...

Artemis Fowl series

Five books in the series so far, and Eoin Colfer still can keep all of the characters with their personalities intact. It can be a serious do-or-die situation one second, then some sarcasm from Artemis, Foaly, or Mulch the next.

Redwall Series

Come on, it's Redwall!

Silverwing Sequence

Now, if you're a fan of the above series, you'll like this one. The book flows at just the right speed all the time, going fast and heart-pounding enough during action or suspenseful sequences, while flowing slowly the next.