All in epub format and some in mobi:

The Wasp Factory (1984)
Walking on Glass (1985)
The Bridge (1986)
Consider Phlebas (1987)
Espedair Street (1987)
The Player of Games (1988)
Canal Dreams (1989)
The State of the Art (1989)
Use of Weapons (1990)
The Crow Road (1992)
Against a Dark Background (1993)
Complicity (1993) 
Feersum Endjinn (1994)
Whit (1995)
Excession (1996)
A Song of Stone (1997)
Inversions (1998) 
The Business (1999)
Look to Windward (2000)
The Algebraist (2005)
Matter (2008)
Transition (2009)
Surface Detail (2010)
Stonemouth (2012)