As someone who helped write one of those guides… I would encourage people to write even more. Different texts can help different people. The more the merrier!
This is exactly what I have found. You can find 10+ guides on networking and usually it's 1 chapter from this author, 1 from this author, 2 from over here... the perspectives or writing styles collage together to present me with the thing that helps the material "click". Enough exposure and you become capable :)