Then your reading I believe should be this one:
It will give you a wider view, more useful I believe for what you plan to use it.
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This one is (not rome related) also A M A Z I N G:
Here is a small cut from this lecture.
download clip * I prefer the audiobook, always. As allows me to multitask. But I find that reading is always more productive to the mind, it usually "aligns" your mind with the writer providing a better grasp of the content.