Halo: The Thursday War

Halo: The Thursday War is the second novel in the Kilo-Five Trilogy by Karen Traviss, and a direct follow-up to Halo: Glasslands. It is set to be released on October 2, 2012.

Official summary
"Halo: The Thursday War picks up immediately where Halo: Glasslands left off, with forces on Earth and among the Covenant threatening a peace that is precarious at best. With a splinter group among the Sangheili pushing for war, some human colonies rebel against Earth authority; and as ONI policy continues to shift with the volatile situation in space, the discovery of a trove of Forerunner technology on Onyx provokes leaders on Earth to seek uses for it in the conflict. For the fight is far from over..."

Trivia

 * A Thursday War is a colloquial name given in the Royal Navy for weekly war-fighting and damage control exercises that are held during Flag Officer Sea Training (FOST), so named because they are usually held on a Thursday.
 * The title of the novel is foreshadowed in Chapter 17 of Halo: Glasslands, where the A.I. Black-Box tells Captain Serin Osman that "We might even get you on a Thursday war."