Zombie Apocalypse: I Alone Have a Shelter

When the undead rise and civilization crumbles, Su Yu returns from the future with a desperate warning—only to be branded insane and hurled into a zombie horde. On the brink of death, his Zombie Shelter System awakens, granting him humanity's last bastion of safety. Now armed with an impenetrable refuge and cold resolve, Su Yu vows revenge: "You called me crazy? Fine. None of you are getting through my doors."