This is a “working” replica of a Myst linking book. It’s made out of a copy of the same book Cyan originally scanned as a texture reference.
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 realMyst PC edition. Onboard 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.