books.google.com - Among the myriad of constants that appear in mathematics, p, e, and i are the most familiar. Following closely behind is g, or gamma, a constant that arises in many mathematical areas yet maintains a profound sense of mystery. In a tantalizing blend of history and mathematics, Julian Havil takes the...http://books.google.com/books/about/Gamma.html?id=7-sDtIy8MNIC&utm_source=gb-gplus-shareGamma