The college textbook bubble and how the "open educational resources" movement is going up against the textbook cartel and The new era of the $400 college textbook, which is part of the unsustainable higher education bubble
Community College Consortium for Open Educational Resources: Case Studies
Florida Virtual Campus 2018 & 2016 Student Textbook and Course Materials Survey and Information
Guerilla Open Access Manifesto
Opening a New Path to Success - A Journey with Open Textbooks