- Similarly Named Works: Named explicitly after the Japanese title of a 1948 A. E. van Vogt novel, The World of Null-A, or Naru ē no Sekai. One particular idea shared between the two is an interstellar human society that exists outside of Earth, but otherwise they're nothing alike.
- Write Who You Know: The characters of Yagi's book seem suspiciously similar to Narue and Kazuto, except with sdrawkcab names. It turns out, the characters were actual people who were involved in a catastrophe that happened long ago in Avalon's history.
Trivia / The World of Narue