From a Chronicle of Higher Education Article by Ben Wieder:
A new partnership between the HathiTrust Digital Library and a popular academic search service will bring the searchable text of the HathiTrust’s 8.4 million digital-volume collection to more than 200 institutions.
The arrangement will make the full text of all the titles in the HathiTrust collection searchable through Summon, a library search engine created by Serials Solutions, a subsidiary of ProQuest. The collection contains the digital content of more than 50 partner institutions.