The Girl with All the Gifts by M.R. Carey
A story about the end of the world with zombies, but not like your typical one. Humanity is all but gone, but there are some zombies that show signs of humanity. Some zombies have retained their ability to think and 'feel'. Scientists and teachers are studying them to see if a cure can be made. Eventually they are on the run together and have to deal with complicated feelings towards the zombies with them. Are they human? Do we treat them as such?
If this sounds far heavier than it is, don't worry it isn't. This story is told from multiple perspectives in different chapters. It's a great YA novel but still enjoyable for olds like me.