Book sites accounted for 15.93 per cent of all sites visited from the Google Book Search page last week.
Surfers over 55 accounted for a quarter of all visitors to Google Book Search in the past four weeks. Over 55s are 69 per cent more likely to use the site than the average UK internet population, according to Hitwise.
The most likely surfers to search for books were low income elderly people, university students and the very elderly of independent means.
"Whilst the debate will rage on, a better understanding of the audience and their behaviours may help ease some of the concerns among book retailers and publishers," Heather Hopkins wrote on the Hitwise Analyst blog.
The publisher demanded damages of €100,000 for each scanned book.
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