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Mastermind Murderers

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Authors: Kristin Helling
The Mastermind Murderers book series by Kristin Helling includes books The Altruism Effect and The Bystander Effect (Mastermind Murderers Series). See the complete Mastermind Murderers series book list in order, box sets or omnibus editions, and companion titles.
2 Books
#1
The Altruism Effect - Book #1 of the Mastermind Murderers

The Altruism Effect

Kristin Helling
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