A good example, comparable to results in other surveys is this. Median for traditional publication is less than $10k per year. Less for self-publication. It's a miracle books are as good as they are.pic.twitter.com/5ZAkM71ebG
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This sometimes works out well - I was very lucky giving one of my books away for free online ( https://twitter.com/michael_nielsen/status/1031256363458916352 … ). But that involved (a) a lot of luck; and (b) was very field-specific. I wish there was a general model for aligning these interests.
Bring back patronage?
I don't think for tech books those are necessarily out-of-sync. The book I wrote has sold really well for a programming manual, and made me barely any money... but the consulting gigs it opens up are the paydays. Free book => more readers => more contacts => more gigs
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