Are you familiar with the Collections area of HathiTrust?
There are currently 940 public collections created by users and library staff members at partner institutions, including several we have featured. HathiTrust collections provide a way to aggregate digital items related to a common theme, or associated with a given physical collection or location (for instance, the University of Michigan has created a collection of its Hatcher Graduate Reference reading room). Items can be added to a collection from HathiTrust full-text search results pages. Once they have been added to a collection, the full-text and bibliographic metadata of items can be searched independently of the larger repository. Items in collections can also be quickly copied to new or existing collections. These features make collections an easy way to refine a set of search results, share batches of items with others, or (in the case of the Michigan Graduate Reference collection), allow staff and users to search within specific collections to find the book with that one particular index or obscure term that they can pull from the shelf for more information.