(Searches through citations and the full text)
HathiTrust is a partnership of major research institutions and libraries working to ensure that the cultural record is preserved and digitally accessible. A major source of digitized books and other documents. Some of the collection if available for free to all, and additional content is available to Carleton faculty, staff, and students.

(Searches through citations and the full text)
Full text electronic books on scholarly and popular topics, readable online or downloadable to your mobile device. Here is more information on using Ebook Central

(Searches through citations and the full text)
A collection of early English books and tracts, 1475 - 1700.