Preface: The content of the book consists largely of about a dozen articles , or extracts from them that were published......

The famous British mathematician  Bertrand Russel, once wrote; 'Mathematics rightly viewed possesses supreme beauty-a beauty cold and austere, like that of sculpture. The true spirit of delight, the exaltation, the sense of being more than man, which is the touch stone of the highest excellence is to be found in mathematics as surely as in poetry'

This exaltation will surely come to those who succeed in visualizing a four-dimensional figure for, in this act, there is not merely the creation of a figure in four dimensions,but the experiencing of a spatial power not to be known while we are limited to a space of three dimensions. It is probable that the creative power of genius in art, music, literature and in other fields of original activity derives its inspiration from higher dimensional space. 

To visualize the simplest four-dimensional form is to experience something of this power for, by this act, we have taken the first step 'Into the Fourth Dimension'.