Ok, so the AC/DC hack doesn't quite work but it gets the desired message across.
I was scanning through my Twitter feed the other day and came upon a "Follow" that I'd forgotten about: @CiscoeBookDeal. It boils down to this: If you are on a Cisco certification track, or you value network technology texts written by certified (and battle-tested) experts for the VERY reasonable price of $USD10 then you should become familiar with this service in whatever way suits you best.