Hmmm - I think mine change with the wind, but I'll give it a go (I stretched things and made it 6):
Cryptonomicron - Neal Stephenson
Perdido Street Station - China Mieville
Skallagrig - William Horwood
Wyvern - A A Attanasio
Tigana - Guy Gavriel Kay
Doomsday Book - Connie Willis
Hard to imagine I didn't put the following in there:
Crime and Punishment - Fyodor Dostoyevski
<anything else by China Mieville> - China Mieville
Daughter of Empire trilogy - Raymond Feist and Janny Wurts
Consider Phlebas - Iain Banks
The Wasp Factory - Iain Banks
The Long Road - Stephen King
Koko - Peter Straub
Ok... I could go on forever.