Hathi Trust’s Emergency Temporary Access Service (ETAS) provides online access to in-copyright books in the Yale Library collection. Catalog records for ETAS items can be found through Quicksearch and Orbis. If you’re already using the Yale VPN, you can click on the “Log In” link at the top of any Hathi Trust page and select Yale from the drop-down menu (if you access Hathi Trust without using the VPN, you will initially receive a prompt to use Duo Multi-Factor Authentication in order to access the database first).
A short video on the Hathi Trust ETAS can be found here, and a library guide here.