The End of the Final Descent

One has the feeling that throughout the process of writing his four book series, the Monstrumologist, Rick Yancey was trying to find the story he was writing, and that finally, in book four, the story found him. It is as if creator and creation were travelling the same circle, each feeling the way forward in frightful darkness, and finally, together, closing the loop, meeting in a grim, though gratifying embrace, just exactly where they were destined to meet from the very beginning. In short, it is difficult to imagine a more perfect conclusion to the tale than that reached in The Final Descent. 

The only problem is that it is also difficult to imagine what I can read now that will be half as engaging!