I'm noticing curious spikes occasionally in the usage stats ( via tools.wmflabs.org/pageviews/ ) for a Wikibook I wrote and maintain. I would guess that many of the visitors are coming via a search engine. Some blogs provide authors with a sanitized subset of HTTP referer {sic} header information, specifically the search engine search terms. I'm looking for that or something similar for Wikibooks.
How may I go about getting a sanitized list of search terms used to enter that Wikibook or its chapters?
Regards, Lars