Mark Olshaker
Audio Books
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by Mark Olshaker
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Recently retired after 25 years of service, John Douglas can finally tell his unique and compelling story....
2.
by Mark Olshaker
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Journey Into Darkness is about John Douglas wherein he helps police identify the unknown perpetrator of a violent series of rapes, kidnappings, or murders through his remarkable criminal personality profiling.
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by Mark Olshaker
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We are facing an overwhelming army of deadly, invisible enemies.
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