Langara Library has many e-books in its collection. These enable better access since users can read them from anywhere, but many do have limits on the number of users that can use them at the same time -- much like a print book. You can view the access limits when looking at the record for the book on the e-book platform.
ProQuest Ebook Central:
EBSCO Ebooks:
If you cannot access an e-book, check whether it is limited to 1 user at a time. If it is, wait a bit and try to access the book later.