We are in the business of publishing "Living Books", which are books that are rapidly and frequently updated, usually through a process that benefits from feedback by readers.
Each of our books on LeanPub.com has an attached forum, on which readers can submit feedback. The more feedback we get for a book, the more that book gets updated.
Our books have no need for errata because all updates and corrections are rolled into the books themselves. Unlike traditional book publishing, we leverage LeanPub.com's marvelous platform to keep our books up-to-date every few weeks, instead of every few years in traditional book publishing.
We invite you to write with us! We use ConTeXt and Git to write our books. If you need help with those tools, let us know, so that we can publish books on those tools to help you get started!
Our topics cover a wide range, from sciences to humanities to mathematics and music.