Yes, there's another similar book called The Planiverse by A.K. Dewdney that demonstrates a vertical plane-world with a host of 2d innovations necessary for wor

Yes, there's another similar book called The Planiverse by A.K. Dewdney that demonstrates a vertical plane-world with a host of 2d innovations necessary for working mechanics and biology. http://en.wikipedia.org/wiki/The_Planiverse http://en.wikipedia.org/wiki/The_Planiverse