I'm currently on "Naked Empire" which is the 8th book of the series. I understand the 9th book "Debt of Bones" is actually kind of a prequel, which goes back to when Zedd was younger--so I'm looking forward to that. I really liked "Soul of the Fire" and "Pillars of Creation".
I've seen one episode of the TV series and was a bit disappointed. I'd watch it again if there was nothing else on, but I wouldn't seek it out or anything.
Yeah, I've read them all. He is an amazing author, and the books are great. Though I'm surprised to see him mentioned here. He is a devout follower of Ayn Rand, and her influence is very obvious in the later books. To be fair, its only about personal responsibility, not at all about religion.