My general strategy is to write about books that I happen to be reading anyway. I'm finding that it's a great way to deepen my knowledge retention of the books that I read. It took me about 5 to 7 hours to synthesize the contents of the book into these main themes. If you read the book you'll find that it's organized very differently from the themes that I've identified.
So, sorry if it's coming off as garbage affiliate content just created for the sake of sales. Definitely not my intention.
Hopefully that gets you a step closer to 3 sales.
Very interesting, and I also appreciate the discussion that it has launched here as well (for example, I didn't know that salt dissolves part of muscle protein)
If you really want to make this model sustainable long-term I might even make the recommendation paragraph dynamically customized based on referring source (here's a WordPress plugin that would let you do this: https://wordpress.org/plugins/if-so/). History enthusiasts are likely to be intrigued by a different set of things from the book than HN's business & systems-thinkers or an RPG community interested in world-building inspiration.
Lots of people will read a general-interest article (quick & no cost), but to get conversions to an actual sale, you need to target specific interests.
I appreciate the author’s work and, if I were in the market for a book about the history of salt, I would have been glad to click his link. I am sure the more financially blessed among us would love to live in a world that wasn’t so gauche as to require people actually making money from their work, but that isn’t reality. Not everyone has the privilege of just giving away work for free. The funny thing is that if the author had a paywall, people would complain about that. I don’t understand the resistance to people trying to make money with content, especially when done in an unobtrusive way.