Yes, LibrarySearch supports searching for e-books and e-articles by DOI.
Definition: DOI (digital object identifier): "A DOI is a unique alphanumeric string that identifies content and provides a persistent link to its location on the internet."*
Simply paste the numbers part of the DOI into the search box, choosing the EVERYTHING search mode.
See also: Find article by title
DOI for an e-article
DOI for an e-book