The document discusses how the University of Huddersfield library exploited usage data from over 3 million borrowing transactions to provide personalized book recommendations and improve borrowing habits. Features like "people who borrowed this" suggestions and course specific RSS feeds were added. Since 2006, when recommendations were added to the catalog, the number and variety of books borrowed has increased year over year. In 2008, the library released this usage data to encourage reuse, and it was quickly converted to RDF by another university. The presentation recommends libraries capture and release aggregated usage data with open licenses to power new applications.