Asimov's annotated Paradise lost.
Explanations of allusions and terms found in Milton's epic poem are offered by the renowned scientist and writer. Asimov provides 1105 footnotes to explain the text, an index of biblical quotations, and an extensive index to the text. Joining a fad for annotated classics in the 1970s, Asimov turned his prodigious memory and research skills to the task. His years of studying the Bible pay off here, and most of his notes make connections between Milton's text and biblical passages.