I have a letter in today's Times Higher Education(https://www.timeshighereducation.com/opinion/letters-open-adaptation) repying to Marilyn Deegan on open-access books. The full, unedited version of the letter is in my institutional repository(http://eprints.bbk.ac.uk/id/eprint/19293) or below.
Martin Paul Eve (Thu,) studied this question.