The eBook Collection from EBSCO contains 50,000 titles, most of which have a limit of 1 simultaneous user at a time. This means that if someone else has already opened the ebook, nobody else can look at it until they've closed the window or opened a different book. If you see a message like "This book is in use" when trying to open an ebook, you can usually open it by just waiting a few minutes, until the current user has finished.
However, we now have many ebook resources with no limits on the number of users. Try the databases below this answer to search the eBook Academic Collection, Gale Virtual Reference Library, and Books24x7. With these links, you can search over 150,000 titles, with no limits on the number of simultaneous users.
To find those databases, look for the E-Books link on the right hand side of the Library's homepage.
