Catalpas Atelier Scribe brings Markdown writing, live book layout preview, and publishing export into one desktop workspace. It focuses on the stage where many writing tools stop: turning a long manuscript into ePub, Docx, images, and print-ready PDF. It stands out with CJK vertical typesetting, ruby annotations, references, LaTeX math, custom fonts, page templates, and CMYK / CMYK + ICC PDF export.