Call of Cthulhu adventure - Paper Chase. CS Ferguson, Gamemaster.

"You have been contacted by Mr. Thomas Kimball, heir of Kimball Manor. It seems his library was broken into and burglarized, and some of his uncle's favorite books have been stolen. This particular mystery is especially unusual as his uncle disappeared without a trace only a year ago. He wants to keep law enforcement and media out of his affairs, so he has hired you as investigators to find his uncle and the stolen books, and return with both if possible."