A central goal of the LibreTexts project is to centralize these OER resources into an easy accessible platform for identifying OER content and for facilitating the remixing of this content. This presentation outlines our efforts to centralize OER by harvesting existing repositories and reformatories within a comprehensive set of libraries. Also key to this effort, is the construction of an “OER Remixer” application (https://tinyurl.com/y833gksj) that empowers faculty to remix custom textbooks.