(To be fair, I actually got a review copy through Edelweiss, but didn't get to the book at the time due to... probably too many other books to read. Story of my life.)
It's a decent novel. It didn't exactly deal with what the blurbs mentions. From the latter, you'd think it's a techno-thriller involving the Deep Web, groups like Anonymous, the Silk Road, and so on. But the 'Net, while playing a part, is not as much involved as more traditional urban fantasy/horror elements: 'the Light' vs. 'the Dark', an immortal who prolongs her body's current life through blood transfusions, an ex-child evangelist now running a shelter by day and hunting monsters by night, demons...
I did like the way the Deep Net was involved: as a new turf for a war between Light and Dark, with means of action relying on people's obsession with their smartphones, GPS, and connected technology in general. That was a good plot point. I also liked Hannah's 'Mirage' apparatus, in the first chapter of the book, where it is hinted that thanks to it, she's now able to see more than meet the eye.
The story is packed with action, the characters don't really get a chance to rest, and even when they think they do, well, Evil never sleeps, right? As a result, though, it was also difficult to care much about them—so when there were dead people, I barely noticed them.
The more traditional horror/UF elements were also a slight let-down. As much as I like these in general, here, I felt that the technological angle took the back burner at times (one of the characters is actually a technophobe). Perhaps I resented the blurb misleading me more than I thought, too? I would've been more interested in a truly cyberpunk-cum-supernatural angle, rather than the contrary.