This is a physical book, but it also includes a digital copy of the book. The link to download the digital copy will be sent to your email address immediately after purchase.
Note: this is the 2nd print run of the book, which has smoother paper than the original. My opinion is that the 2nd edition is even better for markers, but slightly worse for pencil.
Click here for the digital-only version.
Click here for the colouring book reference images.