There are no words for how disappointed I was when the search function found nothing on this series. For me, it is the absolute epitome of fantasy. It takes me right away from the stresses of reality, into a excellently defined world, with powerful and creative (if stereotypical) characters. This one series really introduced me to the fantasy genre (and to a love of reading itself) at the age of 5, and I have never considered another series to be its equal. If you haven't read it, I REALLY recommend it.
As a warning, the first book IS a little slow, and the development of the protagonist is predictable, but the series is worth the read, without a doubt. Just because something is cliche doesn't mean it can't be excellent.