From Colossal: “An ingenious clock made of books on a shelf, the numbers printed on the spines while the clock itself is embedded in the central book. This will be immediately added to the Colossal headquarters project list. I’m not sure who to credit for the clock itself, but the photo was taken at a client’s home by Shokoofeh Z.Dezfuli.”
You can buy the clock, but the reviews aren’t kind. Still, this would look dope on a book shelf. One would think it wouldn’t be too difficult to make a precise working clock that looks like this.