IntroductionIt's been 23 years since Harry Potter burst onto the public consciousness, even though to some of us it still feels like yesterday. Today, some early copies of the original books are worth a small fortune. Let's see what you need to look for, in case that old copy in your bookshelf turns out to be magical treasure. Thanks to Holne Books, located within the national park boundaries of Dartmoor (Devon, England) for this article idea and helping with samples to study Procee...