Greg Bear is the author of more than thirty books of science fiction and fantasy, including Hull Zero Three, City at the End of Time, Eon, Moving Mars, Mariposa, Quantico, and the New York Times bestselling Halo novels Cryptum, Primordium, and Silentium. He is married to Astrid Anderson Bear and is the father of Erik and Alexandra. Awarded two Hugos and five Nebulas for his fiction, one of two authors to win a Nebula in every category, Bear has been called the "best working writer of hard science fiction" by The Ultimate Encyclopedia of Science Fiction. His stories have been collected into an omnibus volume by Tor Books. Bear has served on political and scientific action committees and has advised both government agencies and corporations on issues ranging from national security to private aerospace ventures to new media and video game development. He is part of a long-term collaboration with Neal Stephenson and the Subutai Corporation on The Mongoliad, an interactive serial novel available on multiple platforms.