From the press release:
Microsoft Corp. today announced two key advances in Windows Live Book Search, a service that will enable Web searchers to find answers from authoritative, trusted book content. The addition of two new participants, the University of California and the University of Toronto libraries, will result in an addition of digitized material, primarily out-of-copyright books, from these two institutions to the Windows Live Book Search service. Also, the recently debuted Windows Live Books Publisher Program enables publishers to submit in-copyright material to become part of Windows Live Book Search. … With collections totaling more than 34 million volumes in the more than 100 libraries on its 10 campuses, the University of California library is the largest research and academic library in the world. In addition, the University of Toronto's library network, the largest in Canada, has more than 15 million holdings and is one of the top-four research libraries in North America. These important collections will greatly expand the depth and breadth of content available through Windows Live Book Search.