This is kind of like a book, but adds chapters periodically, is free, includes comments and is even editable by the author: http://unenumerated.blogspot.com/ https://twitter.com/TheAnnaGat/status/1000896679934119939 …
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You can't buy a digital book to signal to your friends family and yourself.
print newspapers produced a similar social signal — wall street journal famously made this their marketing strategy — but nonetheless died. physical books seem to have a utility.
