You clicked on the "Comic" button, didn't you?
Yeah, that's the part where this website design is confusing; if you want to read the comic in a comfortable and easy to navigate fashion, you are basically supposed to avoid the Comic-button like the plague. Just click on the big Erfworld button (of which Comic is a subregister) itself, and it will take you to a page where you can access any individual comic you want straight away, with big links towards any Book you want (which then lead you to a neat overview of all the pages to easily find the one you need).