Hi Joe,
The Halo universe has five times been adapted into novel form, with two more in the works.
1. Halo: The Fall of Reach—a prequel to Halo: Combat Evolved, written by Eric Nylund and published during October 2001.
2. Halo: The Flood, served as an adaptation of Halo: Combat Evolved written by William C. Dietz.
3. Halo: First Strike, a sequel to Halo: Combat Evolved, or, more accurately, a prequel to Halo 2 by Eric Nylund.
4. Halo: Ghosts of Onyx, written again by Eric Nylund was published on October 31, 2006.
5. Halo: Contact Harvest by Joseph Staten (revolves around the events during 2525, the initial contact with the Covenant, is told from the perspective of young Sergeant Avery Johnson, and is expected to be available in the fall of 2007).
Another book to be published by TOR, may be about "Grey Team," who were sent on a mission far outside the confines of UNSC space, and have been missing for over a year as of 2552, which was told in Ghost Of Onyx. Eric Nylund has admitted he is interested in telling their story.
Have fun reading Joe, but you know......I could suggest better books to read but boys are boys!
