Greg Bear was the author of more than fifty books of science fiction and fantasy, including The Forge of God, Eon, Slant, and the Nebula Award winning novel Moving Mars. He also wrote gaming tie-ins such as Halo: Cryptum, and Hull Zero Three. Awarded two Hugos and five Nebulas for his fiction, he is one of only two authors to win a Nebula in every category. He was called the "Best working writer of hard science fiction" by The Ultimate Encyclopedia of Science Fiction. His stories were collected into an omnibus volume by Tor Books, The Best of Greg Bear. Bear served on political and scientific action committees and advised Microsoft Corporation, the U.S. Army, the CIA, Sandia National Laboratories, Callison Architecture, Inc., and other groups and agencies. He died at age 71.