An absolutely amazing conclusion to a fantastic series. The build up to this volume has been fantastic as Gail Simone has given us little snippets into this sinister world that threatens in the dark just beyond our reality, and with this volume she fully unleashes the demonic threat in full force. The writing is spot on really setting up the tension of the impending threat as it gives us the puzzle pieces of what exactly has been happening through out the entire series. It does wrap up a little quickly for my tastes but it does a fantastic job letting the reader know exactly what is going on. The art shines in all its gory splendor this volume as we see the demonic hordes attempt to fully break into our world. This was a series that took me two volumes to get into but I'm sure glad I gave it chance. If you're looking into a sci-fi/horror/thriller book look no further than Clean Room!