I should not have finished this book. It started with all the interesting drama surrounding the enigmatic mathematician Grigori Perelman who had solved the Poincare conjecture and refused the Field Medal and the million dollar millennium prize. But then it got bogged down both in the history of the Poincare conjecture and the pedigrees and lives all the men who had tried to solve it. The math was a bit over my head. I like pop math books generally but not this one.