Leonard Riggio, the visionary founder of Barnes & Noble, passed away at the age of 83 following a battle with Alzheimer’s disease. He was celebrated for transforming Barnes & Noble from a single bookstore into a bookselling empire, famously known as “The World’s Largest Bookstore,” and for pioneering the concept of the bookstore “superstore,” which combined a vast selection of titles with a welcoming, comfortable environment Fox Business – and Fox Business Leonard Riggio, a bold and self-made entrepreneur who revolutionized the publishing world by transforming Barnes & Noble into the most dominant bookseller in the United States, has passed…