The Keys to the Kingdom series
2003 Mister Monday
2004 Grim Tuesday
2005 Drowned Wednesday
2006 Sir Thursday
2007 Lady Friday
2008 Superior Saturday
2010 Lord Sunday
The Seventh Tower series
2000 The Fall
2000 Castle
2001 Aenir
2001 Above the Veil
2001 Into Battle
2001 The Violet Keystone