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River of Blood : Errand of Vengeance Book Three

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Star Trek: The Original Series: Errand of Fury #3: Sacrifices of War

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Star Trek: The Original Series: Errand of Fury #2: Demands of Honor

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Star Trek: The Original Series: Errand of Fury Book #1: Seeds of Rage

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Van Helsing

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Killing Blow : Errand of Vengeance Book Two

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The Edge of the Sword : Errand of Vengeance Book One

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Requiem

Michael Jan Friedman, Kevin Ryan