Synopsis
The Fourth Dimension guides you on a mind-expanding journey; the book is designed to alter the reader's perceptions of the universe through the exploration of a fourth dimension (a fourth spatial dimension, rather than the simpler notion of time as a fourth dimension). The information gives the reader a much better understanding of the concept of higher dimensions, whose existence must be presumed in order to complete some of the mathematical equations of quantum mechanics. Abbott's Flatland is put to use by means of analogies, which are used throughout the book. Rucker compares how a square in Flatland would react to a cube in Spaceland to how a cube in Spaceland would react to a hypercube from the fourth dimension.
In addition to the 200 pages of the guided tour of the higher universes, many puzzles (see mental-skill game) are included to help the reader gain the mental tools necessary to envisioning a fourth dimension.
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