First published in 1764, An Inquiry into the Human Mind mounts a decisive challenge to the early modern "theory of ideas" from Descartes, Locke, Berkeley, and Hume, defending direct realism and first principles of common sense. Through patient analyses of touch and vision-double vision, learned perception, and the "geometry of visibles"-Reid argues that perception gives immediate awareness of external objects. His lucid, empirically inflected prose typifies the Scottish Enlightenment. Thomas Reid (1710-1796), a minister-turned-philosopher in Aberdeen and later Adam Smith's successor at Glasgow, wrote amid Newtonian science and the Aberdeen Philosophical Society. Hume's skepticism spurred him to secure the standing of ordinary knowledge and science; his mathematical training and attention to "experiments of nature" shaped the Inquiry's restrained, observational method. Scholars of epistemology, perception, and early modern thought will find a rigorous, historically grounded alternative to representationalism, while newcomers gain unusually clear guidance through contested terrain. The Inquiry remains indispensable for understanding the fate of common sense in philosophy and for contemporary debates about perception, testimony, and the foundations of scientific practice. Quickie Classics summarizes timeless works with precision, preserving the author's voice and keeping the prose clear, fast, and readable-distilled, never diluted. Enriched Edition extras: Introduction · Synopsis · Historical Context · Brief Analysis · 4 Reflection Q&As · Editorial Footnotes.