It's a shame that Terry Pratchett and Neil Gaiman only wrote one book together. Both writers are geniuses in their own ways and working as a duo, the result speaks for itself.
The apocalypse is at hand and a misplace antichrist has no idea that forces of Heaven and Hell are vying for information about his location. In fact, he doesn't know he's the antichrist!
A weird assortment of hangers on get involved, including a group of bikers who mirror the four horsemen of the apocalypse. An uneasy friendship between an angel and a demon named Crawley, who changes it to Crowley, adds to the comedy value.
It's a very worthwhile fantasy read and probably the only one that can make the end of everything amusing.