Larklight trilogy was created in 2006.
Larklight was created in 2006-10.
The ISBN of Larklight is 0747582408.
Viking Trilogy was created in 1957.
The Jade Trilogy was created in 1988.
Amber Trilogy was created in 1992.
Trilogy Systems was created in 1980.
El Trilogy was created in 1999.
The Prodigal Trilogy was created in 2008.
Underworld Trilogy was created in 2010.
The Firebringer Trilogy was created in 1985.
Auton trilogy was created in 1998.
The Wimbledon Trilogy was created in 1993.