Ex-Patriots

Peter Clines’ 2010 debut novel, Ex-Heroes, had a simple, pitch-friendly premise: superheroes meet zombies! Too often, such catchy marketing angles are reductive, but in the case of Ex-Heroes, it was pretty much a dead-on summary of Clines’ double-decker “What if . . . ?” contemporary fantasy sandwich. (What if people with superpowers started to appear…