Third of Val McDermid’s Tony Hill/Carol Jordan books. In this one, Carol is recruited for a special undercover sting operation against a ring of people smugglers in Berlin. At the same time, Tony half-reluctantly gives up his quiet academic life to help out the Dutch and German police to track down a serial killer targetting experimental psychologsts at major universities. The two strands tie up in a smartly plotted story, with a runaway page-turning climax.