The old addage that "A little knowledge is a dangerous thing," comes to mind.
But more than this, I would suggest that the books to which you are referring are the "ClifffsNotes," and it is the courses themselves that are the first-hand source, the text books, if you will. And, moreover, such an overview of a subject that is granted by publications like "Cliffnotes," were never meant to supplant the first hand sources, but are instead meant to supplement a full educational experience (which includes visiting and studying the tangible golf course, or as goes this analogy, actually reading the book!).
Oddly, though, I don't think it's a bad idea overall, just that it might provide people with yet another reason to judge courses and designers based on what they read, and not what they have seen and decided for themselves.