(works better with accessibility tools, like text to speech; and translators)
There are also new PDF and EPUB editions here: https://www.patreon.com/posts/67035520 (it's a public post, I just needed a place to upload those files without consuming my hosting's bandwidth).
One obvious thing you could do to conserve bandwidth is not do loading=auto but loading=lazy. You've got like 70 images in there which are going to download, but how many readers will scroll to the bottom and look at all 70? (Few.)