Definition of "trilogy" []

• A group of three dramatic or literary works related in subject or theme. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Here's what the Ronin trilogy is about (from Travis's website):"
• "Book 1 of the trilogy is already available in the UK and is set to be released shortly in the US through Dial Books, a division of Penguin Group (USA) Inc."
• "Overall, the trilogy is a fantastic piece of storytelling."