Top Options for Social Studies
Many publishers are opening up temporary, emergency access to a wide array of e-books, textbooks, and digital materials to continue fueling scholarship.
Listed below are several that may have particular utility for students and faculty working on social science and interdisciplinary research projects.
If a book or monograph you're after isn't available as an e-book in HOLLIS, you might try:
Hathi Trust Temporary Emergency Access Library
If HathiTrust has a digitized copy, you'll be able to check it out, reserves-style. Presently, loans are given for 1 hour, automatically renewable if there's no waiting list. The key here is to be sure you click on the button, top right 
and choose Harvard University
E-Book Platform, University of Michigan
Areas of particular focus are political science; American studies (especially disability and class studies); Asian and African studies; performing arts. (Available through June 30, 2020)