"Paradise Lost" by John Milton is an epic poem published in 1667. It retells the biblical story of humanity's fall: Satan's rebellion against God, his banishment to Hell, and his vengeful plot to corrupt God's newest creation—mankind. Through the temptation of Adam and Eve in the Garden of Eden, Milton explores themes of free will, obedience, and moral consequence. The poem features one of literature's most complex villains and ends with humanity's expulsion from Paradise, yet offers hope for redemption.
See also #20, which is from a substantially different print edition. #20 has 10 books, while #26 has 12 books. Wikipedia page about this book: en.wikipedia.org/wiki/Paradise_Lost