Triage — Jack Ketchum

A stranger walks into a place of business...and starts shooting. Three of horror's most terrifying authors challenged each other to write a novella beginning with that simple idea. But where they each went from there would be limited only by their own powerful imaginations. The results are incredibly varied, totally individual, and relentlessly horrifying. Prepare yourself for three very different visions of fear, each written specifically for this anthology and available nowhere else