See the original announcement about Drupal 6 Content Administration’s release in the Drupal news section.
This is a fun, informative, hands-on learning guide that uses an actual case study. In an interactive and informal manner, this guide presents purposeful examples that continue to build on each other. Clear, concise instructions and practical examples mean you can learn quickly how to take care of the content in your Drupal site. This book is designed for those who run the site day-to-day but didn't set it up, and aren't necessarily that well versed in Drupal or web technologies. You could be a content editor, proofreader, graphic artist, feature editor, or anyone else concerned with managing content on a Drupal installation.