UNI Webtools: Resources for Web Developers
Drupal Training
Drupal Books
Pro Drupal Development, Second Edition Apress
John K. VanDyk
Very good Drupal reference book
Using Drupal O'Reilly
Angela Byron, Addison Berry, Nathan Haug, Jeff Eaton, James Walker & Jeff Robbins
Excellent step-by-step tutorial book on using Drupal, also a good reference.
Building powerful and robust websites with Drupal 6 PACKT
David Mercer
Pretty good book on using Drupal.
Copies are available for in-office review in University Relations (contact DeWayne Purdy)
Other Drupal Training Resources
Lynda.uni.edu - Thousands of web design and development training videos, including Drupal 6 and 7.