Formats

This is a web book, designed to be read on the web (with or without an internet connection). So you can start reading now. But if you’d prefer to have a copy of this book in another format, you can download a PDF in portrait format (7 MB ) or a PDF in landscape format (19.9 MB ). There’s also an EPUB version (4.4 MB ) and a MOBI version (10.4 MB ).

Audio

You can subscribe to a podcast feed of the book via RSS , iTunes, Stitcher, or Pocket Casts.

Or you can listen to individual MP3 files: Introduction, Foundations, Materials, Visions, Languages, Layers, Steps, and Challenges.