There is currently a 2nd edition of this book in the making.
You can either download a .zip with all the source code from the releases page, or use the github way of cloning the repository on your computer.
As we the authors, are currently working on the 2nd edition of this book, then we no longer will provide updates for the 1st edition.
To get in touch with the us the authors you can:
Happy reading and riding the Camel.
Claus Ibsen, and Jonathan Anstey