For sure, the site design is definitely esoteric. Yes, the important content is under readings.
I should've pointed out, these readings should help with the intangible aspects of graphic design - one you the ideas of x-height, kerning etc. It's almost art-oriented, but I feel will give a better understanding of graphic design rather than being led down a history of graphic design again.
It's probably a resource for someone who wants to take a deep dive.