The first novel in the series, titled Halo: Cryptum, was released on January 4, 2011, followed by Halo: Primordium on Janu and the final novel, Halo: Silentium on March 19, 2013. They were contracted to published two novel series as tie-ins for Halo 4 The Forerunner Saga, a trilogy of Halo books authored by Greg Bear set in the time of the Forerunners. Tor Books also reissued the first three Halo novels, Halo: The Fall of Reach, Halo: The Flood and Halo: First Strike, with updated content in Fall 2010. The subsequent Halo novels have all been published by Tor, including the short story collection Halo: Evolutions - Essential Tales of the Halo Universe, which was released on November 24, 2009. The third novel - sixth in the overall series - was Halo: The Cole Protocol, written by Tobias Buckell and released on November 25, 2008. The second book was Halo: Contact Harvest by Joseph Staten, which was released on October 30, 2007. The first book to be published by Tor was Halo: Ghosts of Onyx by Eric Nylund, released on October 31, 2006. Tor was contracted to publish Halo books following the first three novels, which were published by Del Rey Books. On February 4, 2014, it was announced that 343 Industries had contracted Gallery Books as their new publishing partner, marking the end of the deal with Tor.

Martin's Press, Henry Holt, and Farrar Straus Giroux, it is now part of the Holtzbrinck group. Tom Doherty Associates, LLC, was formed by Tom Doherty in 1980, and sold to St. It is a part of Tom Doherty Associates LLC, which publishes popular fiction, and is particularly noted for its science fiction and fantasy titles. Tor Books is a publisher that published several Halo novels under contract with Microsoft Studios from 2006 to 2014. There is more information available on this subject at Tor Books on the English Wikipedia.

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