Microsoft Certification - 70-764 Administering a SQL Database Infrastructure

Firstly, I apologise if this is not necessarily the best place to post such a question. I am currently preparing for my 70-764 exam. I have purchased the following book: 70-764 I have a few questions regarding the book and its resources: 1. Previously, I have purchased other Microsoft Certification books and have normally got a PDF version, along with the printed book. Is this not the case anymore? Am I missing a disk or something? 2. The book has many URLS for supporting resources, however, these dont appear to be valid any longer. For example, early on within the book, there is a URL given for a list of useful links which accompany the book, I cannot find these online at all. 3. Practice tests also used to come with the book, however this does not appear to be the case any longer. Is this by design? Or am I just missing something here? Many thanks in advance for any assistance.