Pearson said in a written statement that the differences between the books could be attributed mostly to the fact that the California book was published several years later, and that concerns over coastal flooding have become “more heightened in recent years.”
If you’re going to change the textbook for one state and update the information, why not do it for all of the other states. This quote states that their last textbook was 7 years prior to the one in California. So why not make another book with updated information, that way the information isn’t skewed.