Rhys Hughes describes the novel as stronger than The Star Virus but "dated" and conventional, noting that the primary distinguishing feature comes from Bayley's decision to concentrate on the pressures of the disaster rather than its physical effects.
John Clute described Empire of Two Worlds, along with Annihilation Factor and Collision Course, as "variously successful".
The O'Reilly Factor | The X Factor (UK) | Microphthalmia-associated transcription factor | The X Factor | Fear Factor | Max Factor | Annihilation: Conquest | The X Factor (TV series) | B-cell activating factor | Epidermal growth factor receptor | Psi Factor: Chronicles of the Paranormal | Astro Boy: Omega Factor | twist transcription factor | The X Factor (U.S.) | The X Factor (UK TV series) | The X Factor (UK series 2) | The Omega Factor | The Butch Factor | The Adonis Factor | Sp1 transcription factor | Rheumatoid factor | PSI Factor | O'Reilly Factor | Insulin-like growth factor 1 | Factor Three | factor | ETX (form factor) | epidermal growth factor receptor | Britain's Got the Pop Factor... | battle of annihilation |