I recently took a new position at a new company. We are going to be deploying several 100 machines with Red Hat 5.5 and moving to Red Hat 6. I will be receiving a fully depreciated machine

with either 5.5 or 6 on it. Is there a particular book out there that is recommended? My boss has given me the green light to get "ramped" up.
What's really exciting is I have an enterprise account, so I can call Red Hat directly if I have any questions and their experts should be able to assist.
I am really just looking for one resource to start off with. I won't need to be an expert, but as the supervisor I will need to be able to train the techs on our deployment and data migration process. There is one in place, sort of, but I would like to obtain additional knowledge so I can have the Linux knowledge to offer not only a high overview, but to attack processes from a technical level as well.
Thanks for any advice.