With Hellion, we get another strong entry to the series. This book is much more action oriented, with less character development than we saw in previous books. Much of what we see here is a battle of the minds in addition to forces. Also, gotta say, both the mechanic of story telling through Wesley interactions and some Wesly moments in general were a lot of fun.
DS does another nice job with the narration, keeping up the quality of the other books.
If you have enjoyed the series so far, you should enjoy this too.