The Association of Research Libraries has sent a letter to the Federal Trade Commission regarding Google Books privacy issues.
Here's an excerpt:
This consent order presents a unique opportunity to shape best practices in reader privacy for a major online service provider. The marketplaces for e-books and for book search are both in formative stages, and the standards adopted by Google can be highly influential for other market participants. We urge the Commission to confirm that reader privacy deserves the same respect in the online world that it has long demanded in the physical world by insisting on strong protections for reader privacy in the comprehensive privacy program.
Read more about it at "In Comments to FTC, ARL Suggests Privacy Oversight for Google Books."