It took a while to get into it, but I'm hooked on the series now! (Currently on the second book).
I found the prologue absolutely electrifying, and couldn't wait to unravel the mystery, but the book made me work for it! The first third of the novel has parts that just don't seem to take us anywhere (though they ultimately do; I learned a lot of patience!). Once the threads converged and everyone was moving towards the same goal, though, I couldn't put it down. I also love how open the end was. There was a world of possibilities for some of the main characters, and I'm curious to see when they'll pop up again.