The book which can be read left to right or right to left, consists of several pages of three letter acronyms of airports throughout the world arranged in a grid. The size of the type face becomes progressively larger until only one three letter acronym is printed per page. The center section contains curved lines connecting dots, resembling airplane routes between cities. Also included are pages in English and Japanese of descriptive phrases printed in black and white checkerboard blocks. -- Source of annotation: Marvin or Ruth Sackner.