I just read that the book "Inside Active Directory" has a second edition comming out. I thought the first book was great and went into great detail about the inner workings of AD. The second book is going to cover the changes to AD in Windwos 2003. I would definately recommend the material to anyone who deals with AD on a day-to-day basis. It is however, too in-depth for just basic administration of accounts.
Here's the authors website:
http://www.kouti.com/
