An open access movement is currently sweeping through the academic world. It centers on four shared intuitions that knowledge should be free and open, collaboration should be easy, contributions to education and research should be recognized, and concepts are linked in surprising ways. In this free webinar, 2021 McGraw Prize winner Richard Baraniuk, the C. Sidney Burrus Professor of Electrical and Computer Engineering at Rice University and Founder and Director of OpenStax, details the past, present, and future of the open access textbook movement from the perspective of the OpenStax OER initiative.