Spoiler free
As always, Fitzek leaves me speechless—this is the fourth book of his that I’ve read and I have to say it’s better than "The Inmate" and about on par with "Passenger 23," but by no means as good as "The Experiment."
Positives: The exterior is, as always, quite unique, giving the impression of a package. The story is very well crafted with quite good characters with deep psychological backgrounds. The ending is incredible from many perspectives, taking you from twist to twist right up to the last page.
Negatives: The beginning was somewhat uninteresting and made me bored, but from page 100 the action and the author’s magic kick in. I would have liked a bit more action at the start.