The Thirteenth Skull — Bonnie Ramthun

Detective Eileen Reed finds herself in a fight for her family’s life when a murdered archeologist and the Aztec crystal skull he excavated are found at her parent’s ranch near Devil’s Tower, Wyoming. In order to save her family from the hired killers who have targeted the ranch, she must unlock the secrets of the ancient crystal skull unearthed from the skeletal arms of an Aztec warrior.