Just a feature request for down the road: it would be nice if the google analytics tracking code dispatched on every query event; that way we could see what the most popular queries are directly from the analytics dashboard, get a better sense of how users progress through the bookworm. It might even be good to dispatch a few other events on, for instance, clicking on the "settings" bar or mousing over the lines, which is currently the only indication that a search is possible.