OER Knowledge CloudJournal Article20122012/06Hilton, John LeviWiley, David A.sustainabilityopen textbooksOpen Educational Resourcesopen accessFlat World Knowledgeelectronic textbooksCanadaengInternational Review of Research in Open and Distance LearningAthabasca University Press12518-261492-3831Many college students and their families are concerned about the high costs of textbooks. A company called Flat World Knowledge both gives away and sells open-source textbooks in a way it believes to be financially sustainable. This article reports on the financial sustainability of the Flat World Knowledge open-source textbook model after one year of operation.http://www.irrodl.org/index.php/irrodl/article/view/960/1860http://www.irrodl.org/index.php/irrodl/article/view/960/1860960-8024-2-PB.pdfAthabasca, Canada, North America