<div><p>A landmark of Enlightenment thought, Hume's <i>An Enquiry Concerning Human Understanding</i> is accompanied here by two shorter works that shed light on it: <i>A Letter from a Gentleman to His Friend in Edinburgh</i>, Hume's response to those accusing him of atheism, of advocating extreme skepticism, and of undermining the foundations of morality; and his Abstract of <i>A Treatise of Human Nature</i>, which anticipates discussions developed in the <i>Enquiry</i>.</p><p>In his concise Introduction, Eric Steinberg explores the conditions that led Hume to write the Enquiry and the work's important relationship to Book I of Hume's <i>A Treatise of Human Nature</i>.</p></div>