The World of Null-A

The World of Null-A, sometimes written The World of Ā, is a 1948 science fiction novel by Canadian-American writer A. E. van Vogt. It was originally published as a three-part serial in 1945 in Astounding Stories. It incorporates concepts from the General Semantics of Alfred Korzybski. The name Ā refers to non-Aristotelian logic.