Is it intent? Authors write how-to books to make sales, not to pass on information for the good of humanity. Does that mean that all technical works are barely-

Is it intent? Authors write how-to books to make sales, not to pass on information for the good of humanity. Does that mean that all technical works are barely-disguised spam? I'll grant that they probably do like the idea of passing on what they know, but I very much suspect the same thing of the tech lead who was asked to write a blog post by their marketer.