Book of the Week: 'Rowan of Rin'

This week Jacob and I discovered Emily Rodda again.  I read Emily Rodda books when I was a kid (she's been around for a while!) and we've read a couple of those ones together, but this week I borrowed some of her newer fiction books from the library.  We started reading Rowan of Rin together, and a few days later, he'd read through the whole series.  I've now borrowed a few of her Deltora Quest books for him and he's ploughing through them as well.  I think the good writing, the fantasy element (including dragons!) with a young boy as the hero has all captured his imagination.  I asked him to write a bit about the series and what he likes about them:

"Rowan of Rin is about a shy boy who lives in the valley of Rin next to a gigantic mountain.  He goes on adventures to save Rin (in all of them - except for the third one when he saves the Maris).   I like the series because they make my heart beat a bit faster and scare me a bit.  I also like some of the pictures on the covers. 

I like the Deltora series even better so far, because of how the story flows between the books."

But now I'd love to hear from some of you.  Any other Emily Rodda series that your kids have enjoyed?  Are there ideological and theological issues that you've found it helpful to talk about with your kids, which have arisen through them reading Emily Rodda books?

And where should we go after this series?  What books should I be reserving for him next at the library?  Are there are any books you'd recommend for a kid who likes fantasy/adventure books?