From my experience it is more about how to do things with photos such as brighten them remove blemishes etc, a useful book that I would recommend is
this along with a good reference book such as
this
One advantage of using the previous version of elements is that you should be able to pick up a second hand copy of these books which will save some cash.
Personally I have found video tutorials to be the best learning method, I am lucky enough to have two monitors so can play the video on one and do the exercises on the other.