Part 3: Python / Sphinx
Parts 1 and 2 of Quantitative Economics, by Stachurski and Sargent, are great routes into Python for economists. There's lots of good comparative discussion of Python vs. Matlab or Julia, the benefits of public-domain, open-source code, etc. And it's always up to the minute, because it's an on-line e-book! Just check it out.
Want to see how Sphinx performs with math even more dense than Stachurcski and Sargent's? Just check, for example, the Sphinx book Theoretical Physics Reference. Want to see how it performs with graphics even more slick than Stachurcski and Sargent's? Just check the Matplotlib Documentation. It's all done in Sphinx.
Sphinx is a totally class act. In my humble opinion, nothing else in its genre comes close.