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Free Mystery, Thriller & Suspense Books

Find free mystery, thriller, and suspense books. Choose a cozy investigation, a crime story, a historical case, or a thriller from the current catalog selection.

78 free books · showing 73–78

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About Free Mystery, Thriller & Suspense Books

Free mystery, thriller and suspense books cover everything from puzzling crimes to dangerous pursuits and secrets that threaten to surface. Whether you prefer an amateur sleuth piecing together clues or a protagonist facing high stakes, there are different kinds of tension to discover.

Browse cozy mysteries, detective and crime fiction, psychological thrillers, espionage and action thrillers, and historical mysteries. Many free titles introduce ongoing investigators or series characters, making them useful starting points for a new reading obsession.