You definitely should. It's the first of a five-book series, and it's one of the best I've read in my entire life. No kidding!
Cool! I'm pretty sure the one you're reading is in the same series. (They are all novels) I thin it's the second or third or something like that.
Hehe, nope! The Realm Walkers (As far as I know) were published after this series. If you look it up online, you should be able to find it. This series is ok, but it doesn't have the same characters, and overall I enjoyed the other series much more! That said, I'm only on the second book.