Drupal 6 Content Administration, by J. Ayen Green, is a newly-published title from Packt Publishing aimed at Drupal users, who are either not developers or are new to Drupal. 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, and as a reader of drupal.org, you can receive a 15% discount (see below) and benefit the Drupal Foundation!
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.