Now the strat... You enter west on south side. The tome & chest spawn location is in the initial room you wow gold  come into, before you get to Shen'dralar Ancient. As you are looking at the room from the portal, the chest will be across the room on left side (there is another spawn location on the right side - but after you do this a while, you will see it is more profitable to only look for the left side one).
than miss out something important, I'll be assuming that you've never wow gold  used Stealth before and need to know everything. Sorry if any of it seems condescending.