Guys, you're mixing up HTML bookmarks and straight links, but I think I can help fix it so your TOC samples actually download. :)

Instead of:

<p><a id="toc1" href="proxy.php?url=https%3A%2F%2Fgithub.com%2Frealpython%2Fabout%2Fraw%2Fmaster%2Ftoc%2FRealPythonPart1-TOC.pdf">

Why not just skip the dead links and use your chapter-summary id's? You could get things going like bookmarks, and it SHOULD send you over to that very nice GH reader copy.

<p><a href="proxy.php?url=https%3A%2F%2Fgithub.com%2Frealpython%2Fabout%2Fraw%2Fmaster%2Ftoc%2FRealPythonPart1-TOC.pdf%23chapter-summary"> NOTE: Update numbers for PDFs and chapter-summary calls where relevant.

I hope this helps -- I spotted the problem while I was poking around trying to figure out what I'd get if I bought your course. Looks like I learned something already! Thanks for your time.