Comment Non-fiction (Score 1) 278
http://www.amazon.com/Fermats-Enigma-Greatest-Mathematical-Problem/dp/0385493622
Morris Kline' s book "Mathematics, the Loss of Certainty" on how the discovery of geometries where perpendicular lines intersect in more than one point (ellipsoidal and hyperbolic) led to the efforts to determine whether Mathematics as we know it is consistent. Leads up to Goedel's Incompleteness Theorem.
http://www.amazon.com/Mathematics-Loss-Certainty-Galaxy-Books/dp/0195030850/