Five Heads by JL Perish
In 1973, as the Iowa summer draws to a close, Gregg Pierce and some friends decide to spend a weekend at Lake Red Rock. Arriving a day early to claim a spot at the campground, Gregg meets the Stamper family; the father Wayne, his gorgeous daughter Linda, and her older brother Curt. Soon, Gregg's life begins to spin out of control as he is forced by Curt to participate in unspeakable acts of sadistic carnage. An innocent family living by the lake is the target of Curt's unadulterated bloodlust. Will Gregg make it through the night with his sanity intact? Can he put an end to Curt's vile fantasy? What will become of the family Curt has in his sights?