Thinking about Authoring Open Textbooks? the Open Textbook Network offers a guide to get started, and since St. John's is a member, OTN offers additional publishing support. If you are ready to make your own books, with the free version of Pressbooks, you can create a Textbook in EPUB, MOBI and PDF exports. The layout is similar to "WordPress", and allows for collaboration on an open TextBook. The free version includes a Pressbooks watermark, you can upgrade to remove the watermarks.