For most of the book I was getting really annoyed at not knowing what was going on. SOOOOOO many questions with no answers. None of the characters knew anything either. Its not until the epilogue that we actually get the answers to what Wicked is all about and how they came to be. THE EPILOGUE! At least they answered the questions but they literally waited until the last page of the series to do so. 
 Even with my complaints about the lack of direction, I felt like the series ended as it should have ended. It was a conclusion was fit to encompass the story as a whole. Yes, there are some things I would have liked to change... (view spoiler)[ NEWT! No! Not Newt! I wish he never got the flare or at least somehow got miraculously cured. But his death scene with Thomas was fitting to the story. I really liked Newt and he got a raw deal though. And Teresa! I feel like her death was very fitting to her character. Even though I didn't trust her most of the time, I still wanted to see her make it. And to go out right before she would have! That's rough. (hide spoiler)] but these things really fit with the story and I think the plot would have suffered without these events. 
 Overall, I feel this story ended and feels complete now. Did I entirely love the series? No. It was a tad mediocre but just good enough that I wanted to know how things would eventually play out. (view spoiler)[ Also, that last scene with Thomas and Brenda sitting on a cliff looking at the ocean was a nice little button. It made me feel like they were going to be all right in the end. And, on a personal note, I was shipping Brenda and Thomas so hard. I always liked her. :) (hide spoiler)]