I certainly don't object to this
hope it catches on in other states as well.
Though in law school, about half of my books my professors wrote....
Though professor really don't get all that much money from the textbooks they write... I learned this when I was helping one of my professors put together a new edition of several of his books and statutory supplements
It's certainly not fair for them to essentially "take bribes" to make students buy books that might not even be the best for the subject or for the subject matter of the class