A.K. Dewdney’s The Planiverse: Computer Contact with a Two-Dimensional World

The story follows a computer science professor and his students who create a simulation called "2DWORLD". During their experiments, they realize their software has somehow bridged the gap to a real 2D universe called Arde. They make contact with a philosophical being named

: Simple tasks in our world become complex puzzles in 2D. The book includes detailed diagrams for 2D steam engines, clocks, and even a 2D version of chess where pieces must be fanned out at angles to be seen. Social Etiquette

The book's greatest strength lies in its meticulous world-building, which was developed with input from dozens of scientists and technologists. Mathematical Association of America (MAA) Physics & Chemistry