Political polarization may make for a country full of angry people, but for publishers of politically themed books, the currently inflamed passions of the U.S. voting population are nothing short of a financial windfall, as readers snatch up blatantly partisan tomes by the dozens. Of course, the predominence of such aggressively one-sided books is coming at the cost of more serious and even-handed political analysis, but as one publsher puts it, “To publish for the middle of the road right now would be suicide.”