Zone One by Colson Whitehead

The novel takes place in a post-apocalyptic world where a pandemic has turned many people into zombies, or "skels." The protagonist is a survivor who is part of a team tasked with clearing out the remaining skels in Zone One, the area in and around lower Manhattan. The story alternates between the present and the past, revealing the protagonist's experiences during the initial outbreak and his struggle to hold onto his humanity in the face of such devastation. The 4675th greatest book of all time