Modern Philosophy is a free textbook created by Walter Ott. It combines public-domain primary sources with supplementary material and study questions. Everything not in the public domain is licensed under CC BY-NC-SA 3.0.
This modified version of the text is written in Markdown. Markdown is a plain-text syntax that allows for easy conversion to other file formats. Using pandoc, Modern Philosophy can be easily converted to HTML, PDF, EPUB, and many other formats.