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After Lucy Carlisle leaves the Lockwood & Co. agency and goes into free practice, she is unexpectedly visited by Anthony Lockwood himself. He desperately needs a good Listener to perform a difficult task - to find and neutralise the Source of the spirit of a famous cannibalistic criminal. But even during this dangerous adventure, it's clear that the relationship between Lucy and her old colleagues remains strained... Will the team ever be reunited?

Eerie atmosphere, terrifying secrets, dizzying chases, unexpected secrets, witty humour - all this awaits you in the fourth book of the Lockwood & K series.