Synopsis: From the front flap of the Ace hardback: I'm John Taylor. I work as a PI-out of an office tucked away on a shadowy street in a corner of the Nightside, that secret centre of London where the clocks always read three A.M., where terrible things happen with predictable regularity, and where the always-dark streets are full of people partying like Judgement Day will never come. Now it may have arrived - God's own enforcer, the righteous engine of destruction known as the Walking Man, has come to the Nightside. The past few months, the Nightside has seen its share of chaos, some of it because of me. Still, things were getting back to as normal as they can ever be around here. But the arrival of the Walking Man has the Authorities seriously worried. He's a being whose sole purpose in life is the elimination of the wicked and the guilty - and given the nature of the Nightside, there's a good chance that once he get started, he'll just keep on until there's no one left. So they've hired me to stop him. Legend has it that he can't be killed. I'm very much hoping that the legend isn't true...