While codenames are far from uncommon in the technology industry, some of them are cleverer than others. Over at Medium, Robin Sloan, author of Mr. Penumbra's 24-Hour Bookstore, writes about the surprising connection between Amazon's iconic ebook reader and Neal Stephenson's award-winning postcyberpunk novel The Diamond Age. More enchantingly, Sloan brings attention to how a URL in Amazon's e-commerce site has immortalized that link between the two.