This is the beginnings of a book on MuPDF. It is far from complete, but offers useful information as far as it goes. We offer it with the latest release of MuPDF (currently 1.13) in the hopes it will be useful.
Any feedback, corrections or suggestions are welcome. Please visit bugs.ghostscript.com and open a bug with “MuPDF” as the product, and “Documentation” as the component.
We will endeavour to make new versions available from the Documentation section of mupdf.com as they appear.