Some of his best-known works include:
* The Hive: This novel is a thriller set in a world where a hive mind controls the government and the people. It was nominated for the Hugo Award for Best Novel in 2000.
* The Annihilation Factor: This novel is set in a post-apocalyptic world where a nanobot virus has killed off most of the human population. It was nominated for the Nebula Award for Best Novel in 2002.
* Orbital Decay: This novel is a military science fiction novel set in the near future. It was nominated for the Prometheus Award for Best Novel in 2010.
Ferris has also written several series of novels, including:
* The Brotherhood of the Rose: A series of six novels about a secret society that fights against evil.
* The Destroyer: A series of 12 novels about a super-powered alien who comes to Earth to fight crime.
* The Last War: A series of three novels about a war between humans and aliens.
Ferris has won numerous awards for his writing, including:
* The Hugo Award
* The Nebula Award
* The Locus Award
* The Prometheus Award
He is a member of the Science Fiction Writers of America, the Society of Professional Journalists, and the National Space Society.