Mortal Eclipse — David Brookover

FBI Agent Nick Bellamy's world is shattered when the phantom assassin he's been tracking for years brutally murders his wife. Now a broken man driven by vengeance and guilt, Nick is suddenly drawn into an investigation of a ghastly plot to annihilate the human race as well as a 1960's top-secret government project, Mortal Eclipse, which resulted in the accidental release of a monstrous, unearthly killer. Nick must reconcile his personal demons as he battles a sinister underworld of murderous mutants and witches in order to save mankind. But time is running out . . .