From the announcement:
The Digital Public Library of America and HathiTrust have had a strong relationship since DPLA’s inception in 2013. As part of our ongoing collaboration to host and make digitized books widely available, we are now working to see how we can provide our services to exciting new initiatives that bring ebooks to everyone.
The Humanities Open Book grant program, a joint initiative of the National Endowment for the Humanities and the Andrew W. Mellon Foundation, is exactly the kind of program we wish to support, and we stand ready to do so. Under this funding program, NEH and Mellon will award grants to publishers to identify select previously published books and acquire the appropriate rights to produce an open access e-book edition available under a Creative Commons license. Participants in the program must deposit an EPUB version of the book in a trusted preservation service to ensure future access.