Tara B The Morsch et al. book is actually a remix of LibreTexts materials authored by many faculty, in the same order as OpenStax, actually! I think there was a group of faculty who wanted to stick with that order (to preserve the exam/quiz reading instructions and to use the supplemental materials), but liked the way others taught various topics over the OpenStax authors. It's amazing how OER can make 'counting' adoptions and impact very different than simple website traffic! (that is what these are ranked by - not adoptions)