As someone who goes to college to study data engineering this year, I'd say it's a quite impressive collection but I have no idea where to start (readme.md is empty). I hope it will be a useful resource in the future.
You may also want to have a look at the awesome slides: http://kevincrook.com/ucb/slides/UCB_W205_Student_Slides.zip
There is also more recent material, with different and more recent readings that you might also be interested in, but I prefer 2017, which is what I linked to above, seems more thorough and deeper: http://kevincrook.com/ucb/ucb.html