Bill Brock and his team of hunters travel to Two Guns, Arizona, to the Apache Death Cave - the site of an infamous Native American massacre - in search of the Aswang, a legendary shape-shifting, vampiric creature, part dog and part human.
In the maze that is Flagstaff, Arizona’s Volcano Caverns, Bill Brock and his team believe that a giant, deadly reptilian bat creature known as the Olitiau, or "cave demon" has made this cave its home.
Bill Brock and his team travel to Peach Springs, Arizona to a show cave called The Grand Canyon Caverns, to investigate a newly discovered section of the cave, unexplored by man but possibly hiding a murderous creature known as the Rake.
Bill Brock and his team suspect recent black bear deaths are due to the Mapinguari: a descendant of the giant prehistoric sloth. Together they travel to Graveyard Gulch, a treacherous cave in Northern California to hunt this deadly monster.
Bill Brock and the team venture into the abandoned Shadow Mine in Calaveras County, California, to hunt the SubterAlien, a creature that might be more sophisticated than any they have hunted, one that might be armed and hostile.
Bill Brock and his team of hunters travel to Northern California to a river cave called Cross Creek Cavern, where they believe a monster known as the Draco, a vicious lizard/human hybrid, lives beneath the surface of the dark waters.