The Media module for Drupal 7 solves a number of long-standing media-related problems in Drupal. At its core, Media provides a framework to manage media assets on a Drupal site, regardless of whether those assets exist on the site’s server or somewhere else on the Internet. Media has had much active development over time, and was a moving target when Using Drupal was written, so the latest version of Media is a fair bit different from the version we cover in this lesson, "2.0-unstable3." Version 2 of Media is very, very different from version 1, which is a much older version. We highly recommend that you learn the fundamental pieces of Media 2.0 using the source code that comes with the book and is covered in the About the Using Drupal series. That will allow you to follow the lesson without getting lost in the changes. Then, when you upgrade to the latest version down the road, you will have a solid foundation to explore the newer versions.