As intriguing today as when it was first published, Hume's An Enquiry Concerning Human Understanding is a fascinating exploration into the nature of human knowledge. Using billiard balls, candles and other colorful examples, Hume conveys the core of his empiricism—that true knowledge can only be gained through sensory experience. No other philosopher has been at the forefront of the mind than David Hume; physics, psychology, neuroscience—connections to Hume are everywhere. Here is the book that Immanuel Kant confessed to have awoken him from his 'dogmatic slumber'.