Looks like "Firmament"
is now a video game.
This will become Lad's favorite video game.
It's a distant ancestor of Myst, which came out in 1993 and in its time was the most popular video game ever made. It still ranks as one of the most successful and popular games of all time. I never played it, but I remember a lot of discussion about it during the nineties.
This appears to be similar, some sort of first-person RPG.