Infestation (Harbingers Book 6)

Released from the caves of occult rituals, a microscopic evil invades and grows, waiting to deceive, blind, kill, then spread and kill again. Alien or demonic? Natural, supernatural, or both?
Dr. James McKinney, embittered and reclusive, must rejoin the Harbingers team and return to Florida to solve a mystery, save a life, and confront a monster bent on seducing and destroying mankind.