And speaking of things which we couldn’t even have complained about a few short years ago, you know what bugs me? Reading through a chapter of something interesting — say, David Berenstein‘s “Large-N field theories and geometry” — and having pages missing from the middle, at the whim of Google Books. It’s like a game to test one’s knowledge: if page 260 ends with the Polyakov action in the conformal gauge, and page 263 has what looks to be a Virasoro constraint in light-cone coordinates, what could have gone between? Of course, this doesn’t work so well if the missing page has something new you’d like to learn . . . .