Link to assets (pdf, epub, etc) is dead end

[kave-me]

Hi, I was trying to read the book in my kindle, following the link seems it does not point to the correct address.

https://github.com/FrontendMasters/react-enlightenment/blob/71e8c3f3af47a448f6577097401c8e1790b454fe/myIntro.md?plain=1#L13

[ankurparihar]

Looks like gitbook isn't free anymore

https://www.reddit.com/r/gitbook/comments/pk4hht/what_happened_to_gitbook/