Mark Twain remarked that he could never “make a good impromptu speech without several hours to prepare it.” A tweet, restricted to 140 characters, is a reflection of the impromptu conscience of digital society today. This collection of micro contributions from educators, administrators, and learners reflecting on the burgeoning phenomenon of open education resources and open textbooks is reason to celebrate: we are returning to the core vocation of education, which is to share knowledge freely. Clearly these contributors have thought deeply about the value of “sharing to learn,” but more importantly “learning to share.”This book is insightfully clever because it conveys a powerful message that will be a catalyst to nurture and evolve into a growing community of educators worldwide that is committed to the evolution and collaborative planning of education projects rooted in the foundations of open content. It is clear that OER futures are inevitable. After reading this text, I wonder when we look back at the history of these sustainable education futures, will we wonder why it took so long? Get your hard copy today and support OER friendly publishers!