"Ex-Isle" by Peter Clines - The Other Survivors
At the forefront of a new wave of science-fiction novels, Peter Clines decided to push the boundaries of the current prevalent tropes in a very simple way: combining genres. More specifically, he decided to make a crossover of the zombie and superhero genres, which gave birth to the Ex-Heroes series. The original premise in it was very simple: what would it be like for low-powered heroes to try and rebuild society once the dead rise from below?