I'm looking for a good book on affiliate marketing, but I think this problem would apply to any marketing book.
You'd have to be just terrible at your job if you were an author of a marketing book, and you didn't ensure that the first 20+ reviews of your book were positive. As a marketer, you know those reviews have a huge impact on who buys your book, so you pretty much have to find a way to pad them.
But this makes me highly suspicious of such reviews, especially when there aren't a ton of them. And yet at the same time, on the Internet information goes bad fast, so I also don't want to buy a book from 2005, even if it has a ton of good reviews.
And just to make matters worse, if I google for something like "good affiliate marketing books" ... I (of course) get a bunch of affiliate sites, which couldn't care less about the quality of their books. Every site just provides a list of books, in hopes you click on one and make them some money ... but I'm skeptical that the authors of those sites have even read a single one of the books they recommend. Even if one site does provide genuine recommendations, I can't tell them apart from the other dozen that don't.
Between the tiny window of "not so old the information is stale" and "not so new that it only has 20 reviews from the author's friends" ... and with (seemingly) no reliable 3rd party I can rely on ... how do people pick good (and technically up-to-date) marketing books?
P.S. While I'd certainly love some recommendations for a good/modern affiliate marketing book, I'm really more interested in hearing strategies others might use to find good marketing resources, in general ... when all of those resources have strong strategic incentives to be untrustworthy.