[akprasad]

I agree with the spirit of this. If you want serious long-form substance that is the product of months or years of careful effort, it's hard to beat a book. Usually the best long-form content I've found online (e.g. [1]) is itself just an excerpt.

[1]: https://lithub.com/aneurysm/

I've also become a fan of buying ebooks through the Apple Books app on my phone, if you extend the definition of "online" a bit.