In response to COVID-19, HathiTrust Digital Library has made over five million books from Princeton University Library’s (PUL) print collection available online for all Princeton students, faculty, and staff. The Emergency Temporary Access Service (ETAS) includes in-copyright material. Users will have 60 minutes of access to the book on the HathiTrust website during any session.
https://library.princeton.edu/news/general/2020-04-03/over-5-million-books-puls-print-collection-now-available-online-through-new