In this design case, we review the iterative process of designing EdTech Books (ETB)--an online platform through which open educational resources can be published and accessed by the public. We discuss the context and framework within which the platform was created. We then review the chronology of the platform's evolution through the lens of discovering and addressing challenges the developer faced, particularly those that relate to the 5 Rs of Openness and challenges specific to the publishing of open educational resources (OER).