At the Frankfurt Book Fair, where cigar smoke hangs heavy in the hotel lobby and no one would think of passing an evening without getting blind drunk, trends are emerging, visible to anyone willing to throw himself fully into the spirit of the thing. Trend #1: Every book released this year must have the word “code” in the title if it expects to have any kind of commercial success. Trend #2: Shrill, ultra-partisan rants masquerading as intellectual treatises are selling like hotcakes to a polarized society eager to make themselves feel better about the world by reading political pablum with which they already agree.