Demagogue

In the age of Donald Trump's run for the White House, this is an important book. While Trump isn't the subject, he might as well be (and the author has been interviewed several times saying that Trump fits the definition of demagogue to a T). But we do meet several of history's demagogues as well as some of the most important thinkers on the subject of democratic constitutionalism, which is seen as the antidote to demagoguery.