Seas of Sand is a toolbox setting guide for old-school RPGs about a vast desert-ocean of liquid sand. By day, the sand is liquid, and ships sail across them while people sink; by night, the sand is solid, and ships freeze while people walk free.
At the time of the stream, I thought, erroneously as it turns out, that the book was only available digitally but this is not so! You can buy a physical copy through Space Penguin Ink!
