So my first critique here is that I wasn’t sure whether this was a standalone story within the same world of the Underground series, or just another chapter of it. The Amazon and Goodreads pages were not clear when I compared the two. So that was a little bothersome before I even started reading. Now right off the bat, this book dives into the story. You pick up the general idea, even though it felt rushed. The writing wasn’t bad, but the characters, action and plot just didn’t grab me. This book made me remember playing older Resident Evil and Doom games, if anything. It was a very short read and may have benefited a great deal by being expanded and detailed a bit more, to enhance the experience. But again, depending on the author’s intentions of this book, it may have been done already in the first five books in this series. However, as I glanced at the other books plots, leading up to this entry, it doesn’t seem to be the case.