I agree. Part of what sucks about websites is that everyone is trying to things differently. When I see a hamburger menu, I know what it does. It would take me a long while to figure out your site's navigation sits at the bottom of the page.
Hamburgher menus, albeit fancy, where really confusing at the start. Personally I still think overusing them is design laziness.
The authors webpage is functionally similar except the menu is labeled "sitemap" and it's text is always visible to screen readers.
It contains some mystery meat, that's for sure.