Booktype is a web-based publishing platform that can produce books, reports, and manuals in both digital and print formats. Booktype's authoring environment is designed to be clean and intuitive, using a drag-and-drop approach for formatting and images. Multiple authors and editors can be simultaneously working on a publication, supporting a rapid pace of revisions. Booktype was originally created to support FLOSS Manuals. Currently, it is used by Amnesty International, the German publisher Mikrotext, the Research Hive at the University of Sussex, among others. A larger list of current users can be found under the Who's using it? section of the Booktype website. A public demo is also available for users who want to practice with Booktype before installing it. Booktype's web interface works in Google Chrome and Mozilla Firefox. Instructions for installing Booktype on one's own server can be located in the Installation section of the Booktype documentation. Instructions are provided for Linux and macOS. A hosted version of Booktype can also be purchased for a monthly fee. Booktype is free software, distributed under the GNU Affero General Public License, with source code available on GitHub.