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Jacko Vance, serial killer of teenage girls, has been banged up in prison since Book 2. He manages to inveigle his way into a position where he can take the place of a prisoner due to go on day release so he can wreak a plan of revenge.
I can only rate this one as average as the book went on for too long. Tony was definitely off his game, but Carol Jordan really annoyed me. I'm a bit lukewarm about reading the next one after the ending. 3⭐