Book cover of Head cases by John McMahon. Illustration shows a closed folder with a broken red FBI seal.
Book cover of Head cases by John McMahon. Illustration shows a closed folder with a broken red FBI seal.

Head cases by John McMahon

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FBI Agent Gardner Camden, with his eccentric PAR unit, investigates a serial killer linked to a cold case.

AMAZON

BOOK OUTLET

Book 1 of the PAR Unit series

FBI Agent Gardner Camden, with his eccentric PAR unit, investigates a serial killer linked to a cold case.

AMAZON

BOOK OUTLET

Book 1 of the PAR Unit series