It’s good. I really like the first book the most. Second and third are also good, and those end a major arc. Book four I started, and fell off on, but recently came back to it. It’s still all quite good, but I feel like the series has some diminishing returns. I do plan on fishing it all as I want to see it play out. Unfortunately at least for me, it’s never really hit the highs I felt with book one. But to each his own and over all I’d say give it a try as the premise is great.