In this post we will see a wonderful little book titled Universal Physical Constants by O. P. Spiridonov.This is a book that deals with history of science in a wonderful way. There are six stories to be told about the constants themselves and the way we found their values. The constants are:Gravitational ConstantBoltzmann Constant and Avagadro's NumberMass and Charge of electronSpeed of LightPlanck's constantMasses of neutron, proton and other elementary particles