Amber Trilogy was created in 1992.
The final book in the "His Dark Materials" trilogy by Philip Pullman is "The Amber Spyglass."
The Bounty Trilogy was created in 1936.
Cairo Trilogy was created in 1956.
Larklight trilogy was created in 2006.
The Beaver Trilogy was created in 2001.
The Prodigal Trilogy was created in 2008.
Viking Trilogy was created in 1957.
Underworld Trilogy was created in 2010.
U.S.A. trilogy was created in 1930.
The Corellian Trilogy was created in 1995.
The Trilogy - album - was created in 2004.
Seiddab Trilogy was created in 1985.