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A middle-aged dentist found executed in his living room. On the wall, one word, written in blood.

Warrant officer Colin Menck is sent to investigate. He is convinced this is the work of a professional killer. But who had use for such gruesome services?

The victim’s wife seems a bit too unaffected by her husband’s violent death. But why do it? And why the bloody message?

Days later, Menck is at another scene, looking at another wall covered in bloody writing. The only connection between the two seems to be another disgruntled wife.

Now Menck and his troublesome new partner are in deep with no time to lose. How many people are on this murderer’s kill list? How many men have yet to write GUILTY in their own blood?