On the service of evil

Robin Ellacott receives a mysterious package with a courier - in which a cut -off female leg is found.
Her boss, a private detective Kormoran Straik, is not so surprised, but no less was alarmed. In his past there are four possible candidates for the identity of the sender - and each of the four is capable of inconceivable cruelty.
The police focus on the search for one of these four, but the Sterk the farther, the more sure that this suspect had nothing to do with it. Together with Robin, they are forced to take business in their own hands and plunge into the abysses of the distorted psyche of the other three suspects. But the mysterious killer strikes new blows, and Strike and Robin understand that their time is running out ...
“In the service of evil”-a devilishly fascinating novel-mystery with many unexpected plot turns, as well as the story of a man and a woman who are at a crossroads both professionally and with regard to personal relations