A night in the lonesome October - Roger Zelazny

All is not what it seems...

In the murky London gloom, a knife-wielding gentleman named Jack prowls the midnight streets with his faithful watchdog Snuff - gathering together the grisly ingredients they will need for an ancient and unearthly rite. For soon after the death of the moon, black magic will summon the Elder Gods back into the world. And all manner of Players, both human and undead, are preparing to participate.

Some have come to open the gates. Some have come to slam them shut. And now the dread night approaches - so let the Game begin.