Received Purcell's Electricity and Magnetism. Much like The Feynman Lectures, this book is a product of the Sputnik era when textbooks were still written for serious students. This first edition published by McGraw-Hill (ISBN: 9780070048591) is lean and tight and simply well made; the latest version from Cambridge University Press feels a bit bloated by comparison.

There's something magical about the fact that you can buy access to such knowledge for the price of a meal.