I've been on a kick of reading parenting books. I do a thing when I read where I fact check books when I read them (only things which are claims, usually only if cited or very specific).

Out of 7 or 8 books, only a minority have passed without deep deep factual errors. One specific one comes to mind - a book on "Danish Parenting" that cited a monkey study about kids and peer groups. I looked up the original study and the study author had specifically said not to cite the study on young primate behaviors in his disclaimers - he had used zoo raised primates.

Usually books are either generally pretty factual, or just repeated outright lies. "Hunt. Gather. Parent." was one I caught in multiple just plain falsehoods (and they didn't even need the cites! Just state it as an opinion!)

Obviously that is just parenting books which is a tiny niche, but I encourage you to do the same before taking a book as the gospel truth.