This date stands at about 17 years after the book was written, and some of the stuff is just a fresh and crazy as when he wrote it.
The research, pictures, and drawings in this book is amazing.
You get a sort of through the looking glass sideways look at puzzles, mazes and just strange people and drawings that he has dug up. I just read an A. K. Dewdney and compared it with a much later John Casti book. Comparing Dr. Pickover's work in this book to theirs,is like the Harvard quad to Time Square...or MIT to Berkeley.
Open your mind for fun... of a mathematical, graphic or computer sort and read.