Unrelated tangent: I'm always frustrated when I see a recommendation for a book only to go and look it up and find that it's actually an "ebook" (in this case PDF).

Not to make a value judgement on ebooks, but I just really like physical books sometimes - if it was on Amazon I likely would have bought it.

Again, not a value judgement on the content - I'm sure it's great (I'm a paid and happy user of TailwindUI)