This is just my 2 cents, but you've already identified the flaw in Michael's books. I have an older version but in my opinion they're screenshot heavy with a reliance on step by step instructions. Gaining an understanding of the general techniques can certainly be applicable but that's really just the "tradecraft" of OSINT, which I would argue is not where this book shines. I also take issue with Michael because he used to offer a law enforcement only version of his book that contained what he claimed to be techniques not made publicly available nor made available to the impacted service providers, which I feel violates the ethos of responsible disclosure.