防詐3要訣：不聽信、不操作、掛斷電話 
內容簡介
Villisca, Iowa: In 1912, eight people were murdered in their sleep, marking one of America's most disturbing unsolved crimes. More than a century later, investigator Alex Hartman arrives in town after receiving an unsigned letter that simply says: Come. It's time someone took a fresh look.
Alex is no stranger to impossible cases. Years earlier, in a charred Kansas church, he and Dr. Samuel Graves, an academic who treats the inexplicable like a data set, watched a body vanish from a sealed scene. Villisca feels like the next verse in the same hymn. The house is preserved as it stood, its quiet rooms marked by axe-marks and memories. With guidance from local historian Claire Thompson and the last descendant willing to talk, Alex follows threads that connect the past to the present: covered mirrors, meals cooked after the killing, and carved symbols that resemble rituals.
Then the pattern repeats. A modern family is found murdered near town. Doors are locked from the inside. Nothing has been taken. There are marks on the walls. The case instantly becomes a national headline, and all eyes turn to the newcomer who's been asking questions.
As rumors grow, Alex and Graves discover an attic stash: a fragile scrap of paper, an eleven-letter cipher, and clues of a circuit once followed by traveling carnivals and revival tents. The deeper they explore, the more Villisca feels less like a place and more like a design, one driven by shame, spectacle, and the stories we tell ourselves to keep sleeping at night.
Shadows of Villisca is an atmospheric mystery-thriller that combines historical facts with modern suspense. Fans of true-crime elements, small-town secrets, and puzzle-based investigation will enjoy a fast-paced story with relatable characters and meaningful stakes: a community's memory, a family's legacy, and the toll of finally naming a monster.
Themes & appeal: Unsolved crimes; Midwestern Gothic; a found family of investigators; codes and ciphers; the ethics of uncovering the past; grief that haunts walls.
Content notes: Violence consistent with crime fiction; non-graphic paranormal investigation elements.
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