Flatland is a kick ass funny book about multi dimentional space.

Some of my favorite quotes from the book:

• in every family of position and aconsideration, "back motion" is as prevelant as time itself; and the husbands and sons in these households enjoy immunity at least from invisible attacks. (p 12)
  
• A Male of the lowest type of Isosceles may look forward to some improvement of his angle, and to the ultimate elevation of the whole of his degraded caste, but no Woman can entertain such hopes for her sex. "Once a Woman, always a Woman" is a Degree of Nature (p 14)
  
• you are not a Man, but a feminine Monstrosity with a bass voice, and an utterly uneducated ear. (p 46)