Okay, well I guess that’s a bad experience. I don’t think it invalidates the fact the usually book authors should be somewhat knowledgable - of course it doesn’t automatically
mean that all of them is good to work with.
Yes, but... unless you are hiring an absolute EXPERT on that topic and that was the purpose of hiring the person.. I bet that could turn out very poorly.
I mean it's in general like if you hire a PhD into a role that needs to cover a lot of areas, can't be super detailed in anything, and needs to get stuff done as opposed to pure research.. that can turn out poorly.