Each ebook contains every part to a guide's series, brought together in a single place for your convenience.
Think of the ebook as your own permanent copy of a guide. It's yours to keep forever, always available without an internet connection and can be read on most ebook readers, tablets and mobile devices.
While there may not be any additional content or exclusive material, each ebook has been specially formatted for optimal reading and, in the case of the ePub version, include a full Table of Contents. This can be much easier than reading within a browser or a Read Later service.