Some of our ebook vendors are recognizing that libraries may need some help in serving the increased ebook demand this semester. Cambridge University Press has opened a selection of their reference materials, including the Cambridge Companions, to open access until May. There are 1297 books in this collection, including these in philosophy, psychology and religion.
I searched here for keywords" cambridge core reference ebook collection" and lcclassb*
The PDFs here are digital-rights-management free!