Abstract: A writable electronic book, including a binder body, a plurality of electronic paper modules, each representing a single sheet of paper detachably coupled to the binder body, to display content, and a write panel that is included in at least one of the electronic paper modules and that overlaps at least part of a display area of the at least one of the electronic paper modules, to receive manipulation information and write information of a user via a digital pen. The write information inputted through the write panel is added to the content and is stored.