The Economics Daily of the U.S. Bureau of Labor Statistics has an informative interactive graph of consumer price indexes for tuition and school frees from January 2006-July 2016. While tuition and fees have risen 63 percent, college textbooks have risen 87.5%. See the graph and data at http://www.bls.gov/opub/ted/2016/college-tuition-and-fees-increase-63-percent-since-january-2006.htm
Bureau of Labor Statistics: interactive graph shows 87.5% cost increase for college textbooks 2006-2016
