Beware — Richard Laymon

Elsie knew something weird was happening in her small supermarket when she saw the meat cleaver fly through the air all by itself. Everyone else realized it when they found Elsie on the butcher's slab the next morning--neatly jointed and wrapped. An unseen horror has come to town, leaving a blood-drenched trail of carnage in his wake. And his victims are about to learn a terrifying lesson: what you can't see can very definitely hurt you.