Inside the book is a full desktop computer, completely self-contained without any external wires or hardware. In the above photo, the embedded screen isn’t just showing a still photo or a video: it’s running a full copy of real Myst PC edition. On board is a copy of all the Myst games. It’s fast enough it plays all of them smoothly (even End of Ages at ~30fps). You play the games by touching the touch-screen.
The Myst Book