My Roommates Are ZOMBIES

Carson Langster is an education major with no particular standing when the outbreak turns the university into a killing ground. His ex-girlfriend Linda Larrow and George Tarren, the rich classmate he thought was a friend, both leave him to die, and they make sure of it. His roommates come back for him. They get him out and are bitten doing it, and by morning Finn, John Nestle, Rowan and the rest have turned. Carson survives and wakes with something in his head that calls itself the Dorm Manager System. It lets him give orders to the infected and it tells him what he can build. He starts with the dormitory, because it has doors that lock and floors he knows, and he brings his roommates in as they are, still recognizable, still following him. From there he adds a canteen, then pens for livestock, then small workshops, running the building as a place people can survive in while the campus outside fills up. The system upgrades on crystal cores taken from the infected, and Carson wants those for one purpose, which is to raise the system far enough to turn his roommates back.