My son has been listening to “The Last Kids On Earth” book series by, Max Brallie, for the last week since he was admitted to the hospital. He continues to enjoy the series on Audible as he recovers at home.
Wikipedia: The eight books follow a thirteen-year-old boy named Jack Sullivan, who lives in his foster brother’s tree house after a zombie outbreak hits his hometown, Wakefield, Massachusetts. He is accompanied by his best friend Quint Baker, who loves experimenting; June Del Toro, a strong, brave girl who used to be the school newspaper’s editor-in-chief; and Dirk Savage, the local bully with exceptional fighting skills. The friends fight one monster in each book, while trying to stay alive, and stop an entity named Rezzoch, who wants to take over the Earth.