5 Unsolved Mysteries That'll Leave You Haunted

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What is it about unsolved mysteries that makes them so chilling? Maybe it’s the fact that without a conclusion our imaginations are free to run rampant and fill in the blanks with far more terrifying possibilities — or maybe it’s because we know, deep inside, that the truth may be even more sinister than anything our minds could conjure. It’s no doubt that classic unsolved mysteries, like the identity of Jack the Ripper or who killed the Black Dahlia, continue to allure us, but some of the most enduring mysteries might be those you’ve never heard of. From a crime scene that would have baffled Sherlock Holmes himself to a group of hikers found dead under bizarre circumstances, here are unsolved mystery books with puzzling cases that will take you down the rabbit hole.