The words that echo through Geoffrey Nunberg's brilliant new journey across the landscape of American language evoke exactly the tenor of our times. Nunberg has a wonderful ear for the new, the comic and the absurd. He pronounces that: "'Blog' is a syllable whose time has come," and that "You don't get to be a verb unless you're doing something right," with which he launches into the effect of Google on our collective consciousness. Nunberg hears...