Below are just a few sites that will provide a little more information on MEPS than was touched on in the booklet.
MEPS at a Glance - pretty general overview of what to expect and how to prepare for it - http://www.military.com/join-armed-forces/meps-process-requirements.html
Brief Overview of MEPS - same concept from a different perspective - http://usmilitary.about.com/od/joiningthemilitary/a/mepsglance.htm
MEPS Overview Video - http://todaysmilitary.com/videos/a-look-inside-navy-meps
Fort Jackson MEPS - http://www.mepcom.army.mil/meps/fortjackson/