When it comes to reading and buying eBooks the Kindle Store is fairly well the same on the DX, as it is on any modern reader. You have access to all of the core categories, such as Kindle Singles, Kindle Worlds, Kindle Books and even a small Audible category for audiobooks. The Kindle DX does a fair job when it comes to reading PDF files, but pales in comparison to modern rendering engines made by Kobo or Sony.