I skimmed a few chapters and as someone who writes Javascript all day, this looks pretty good. I want to dig into it more.
But I'm going to be "that-guy" and say $39 is too much just to get the kindle/PDF version. I buy a ton of programming books and I tend to only fork that much over for authoritative paper textbooks on particular subjects. Rarely digital versions. Otherwise I'm all with Patrick McKenzie on charging more.
I suspect that if Henrik is already giving away a digital version, with the paid version he's targeting high-rollers motivated to buy one out of a sense of gratitude/largesse. So a high price tag sort of makes sense.
But I'm going to be "that-guy" and say $39 is too much just to get the kindle/PDF version. I buy a ton of programming books and I tend to only fork that much over for authoritative paper textbooks on particular subjects. Rarely digital versions. Otherwise I'm all with Patrick McKenzie on charging more.