From an OCLC Announcement:
The expanded partnership makes it possible for researchers and students to search the full text of content from SciVerse ScienceDirect through WorldCat Local, OCLC’s discovery and delivery service that offers access to more than 922 million items through a single search box. Authenticated users from subscribing libraries can then access the full text of these journals and e-books. The new full-text searching feature is in addition to indexing and abstracts from Elsevier already available through WorldCat Local.
[Our emphasis] As part of this expanded partnership, Elsevier has also added access to e-book data through WorldCat.org, the Web destination for broad, Webscale discovery of library resources.
Read the Complete Announcement