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5/5 Discovering why his boss Sivart disappeared, Unwin plots how to save him.
4/5 Unwin's only hope is the archives. But no-one goes down there without risking their life.
3/5 Charles Unwin discovers his problems might be solved by reading chapter 18 of the manual.
2/5 Investigator Charles Unwin finds his boss's disappearance is linked to a mystery corpse.
1/5 Unexpectedly promoted after his boss's disappearance, Charles Unwin begins his search.