Plaintiffs, authors of published books under copyright, filed suit against Google for copyright infringement. Google, acting without permission of rights holders, has made digital copies of tens of millions of books, including plaintiffs', through its Library Project and its Google books project. The district court concluded that Google's actions constituted fair use under 17 U.S.C. 107. On appeal, plaintiffs challenged the district court's grant of summary judgment in favor of Google. The co...