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A comment on I earned $160k in passive income from writing non-fiction books. Parent comment

Re:I earned $160k in passive income from writing non-fiction... by sdze on Thursday April 28, 2022 @12:52AM (#31188867)
It sounds even stupid to write programming books for passive income. You need to regularly update them in order to be able to sell them well.
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Re:I earned $160k in passive income from writing non-fiction... by robotresearcher on Thursday April 28, 2022 @12:59AM (#31188916)
K&R has two editions. In 46 years. It’s $60 on Amazon today.

It’s an outlier, sure. But it’s proof you can write on programming topics that are very sticky.

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Re:I earned $160k in passive income from writing non-fiction... by greglim81 on Thursday April 28, 2022 @01:11AM (#31188969)
But regularly updating them also gives you the edge over established publishers who DON'T update them.

and its not too difficult to update books, as compared to updating videos.

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