 A collection of Halo short stories, Halo: Evolutions, was simultaneously released in print and audiobook formats in November 2009. Evolutions includes original material by Nylund, Buckell, Karen Traviss and contributions from Bungie. Tor re-released the first three Halo novels with new content and cover art. Science fiction author Greg Bear wrote a trilogy of books focusing on the Forerunners, called The Forerunner Saga. The first book, entitled Halo: Cryptum, was released in January 2011, followed by Primordium in January 2012 and Silentium on March 19, 2013. Karen Traviss wrote the Kilo-Five trilogy, which takes place after the events of Halo 3 and Halo: Ghosts of Onyx. The first book, Halo: Glasslands, came out October 2011, followed by Halo: The Thursday War on October 2, 2012, and Halo: Mortal Dictata on January 21, 2014. The fourteenth Halo book (the thirteenth novel) was released in November 2014: Halo: Broken Circle by John Shirley, the author of novels based on BioShock, Borderlands, and other games.
