I just finished reading A Magnificent Catastrophe: The Tumultuous Election of 1800, America's First Presidential Campaign. It was engaging and pretty well done popular history. Especially interesting in light of the current situation with Russia and Putin, not so totally dissimilar. The changing of election law (i.e. how the electors for each state were to be selected) throughout the campaign is something that it probably not so well known.
Also, Larson does a pretty good job of providing evidence that Thomas Jefferson may have been the Hillary Clinton of his day. I mean, it seems like half the country really hated that atheistic, infidel, Jacobin guy.