*You can find my spoiler-free series review in my review for Book 1.*
I didn't really get into the story until Book 3 since the first two books were short and just setting things up, but this was how I felt about Book 2 after reading it...
Once again, this is hard to rate on its own because of how this was only a sliver of a story. I feel like this overall story is moving very slowly, since Book 1 was roughly 90 pages of Lucas going to Dyavol and getting the job, then Book 2 was another 90 pages or so of him going back and meeting Konstantin again. The writing is decent, I have no issues with anything so far, but nothing is super hooking me yet.