California's massive population and purchasing power influence the nation's standards. For example, CA's clean air act resulted from Los Angeles' geography, which captured pollution and caused severe respiratory issues. The region would be unhabitable if emissions weren't regulated, so the state passed policies that required car manufacturers to produce cleaner fuel-emission vehicles.

This became the national standard because it was cost-effective to streamline US car manufacturing to align with CA's requirements. So, CA's purchasing power should influence the mass production of textbooks if profit is the book manufactures objective, but we live in the strangest times, so who knows?