Lawrence Lessig's Republic Lost documents the corrosive effect of money on our political process. Lessig persuasively makes the case that we are witnessing the loss of our republican form of government, as politicians increasingly represent those who fund their campaigns, rather than our citizens.

Anthony Everitt's Rise of Rome is fascinating history and a great read. It tells the story of ancient Rome, from its founding (circa 750 BCE) to the fall of the Roman Republic (circa 45 BCE).