The Arena by Jonathan Janz

Peaceful Valley is about to become a slaughterhouse! For the first time ever, Samhain Publishing will serialize a terrifying original novel, Savage Species , in five installments, with new installments coming every two weeks. The construction of the Peaceful Valley Nature Preserve, a sprawling, isolated state park, has stirred an evil that has lain dormant for nearly a century, and all the men, women and children unlucky enough to be attending the grand opening are about to encounter the most horrific creatures to ever walk the earth. Part Four: The Arena The two groups meet in a terrible and unexpected way. Sam, Charly, Jesse and Red Elk mount an impossible rescue mission to save Charly's baby and the other kidnapped survivors, but the Children and the Night Flyers have other plans. As Eric descends into madness, a surprising victim will face his wrath.