Who writes these things?" people ask me. I have to tell them, without a hint of irony, "No one." It's symptomatic of the whole muddled mess that is the $4.3 billion textbook business.
Textbooks are a core part of the curriculum, as crucial to the teacher as a blueprint is to a carpenter, so one might assume they are conceived, researched, written, and published as unique contributions to advancing knowledge. In fact, most of these books fall far short of their important role in the educational scheme of things. They are processed into existence using the pulp of what already exists, rising like swamp things from the compost of the past. The mulch is turned and tended by many layers of editors who scrub it of anything possibly objectionable before it is fed into a government-run "adoption" system that provides mediocre material to students of all ages.