Introduction to Objectivist Epistemology is a book about epistemology by the philosopher Ayn Rand (with an additional article by Leonard Peikoff). Rand considered it her most important philosophical writing. First published in installments in Rand's journal, The Objectivist, July 1966 through February 1967, the work presents Rand's proposed solution to the historic problem of universals, describes how the theory can be extended to complex cases, and outlines how it applies to other issues in the theory of knowledge. Source: Wikipedia (en)