Collaborative editing of textbooks is not just about opening a google doc and starting to work together. In order to make this kind of communal effort prosper there is a need for some groundwork: Content design issues require a preliminary thorough discussion, norms for resolving conflicts and communicating should be established, and the platform should be well suited technically for the task at hand. So who edits textbooks collaboratively? What difficulties do they encounter? In this presentation we will discuss these issues and also try to elaborate on what a platform needs to have in order to facilitate collaborative textbook editing.