Books like The Tain

The tale takes place in a ravaged, post-apocalyptic London. A man named Sholl survives by knowing the safe parts of town, and those where people go in and never come out. He’s been living on his own for a while, and decides to befriend a makeshift unit of soldiers camped out in the south of Hampstead Heath. They seem to have their wits about them, unlike other units scattered throughout London who will shoot anything that moves. He wants them to join him. Sholl has a plan to deal with the enemy....