HP Certs / Study materials

in Off-Topic
I am trying to dive deeper into the HP server line, specifically proliant and I saw this reference out there, but its a bit dated, I can't find anything newer for their current certifications so I wanted to see if you guys knew more about this or anything similar thats available. I am aware of all the vendor documentation but for HP I am finding that to be sparse and cumbersome.
HP ProLiant Servers AIS: Official Study Guide and Desk Reference: Safari Books Online
HP ProLiant Servers AIS: Official Study Guide and Desk Reference: Safari Books Online