Correction: the page just copied Reclam’s cover design used for almost every Reclam book there is

I bet that for folks who are designers and get the reference his choice makes perfect sense and it might even be nice. But for me, most importantly, after loading the page it was unclear what to do. Use the menu? Scroll? I don't think it's good design for users to have to guess where the content is or what they are expected to do.

Also looks similar to the JavaScript community style. Since JS determines behaviour on the web, they're likely to have the same audience.