The Antipope, East of Ealing, Brenford Triangle, or any of the 5 part Brentford Trilogy.
The armageddon series can be hard to read if you've not read any of his stuff before.
On your recommendation...Just finished 'The Book of Ultimate Truths'- not bad at all. Liked the style but not amazing... still, I'll try one of the books you recommend next.