eNYPL contains 11,079 ebooks you can digitally borrow, how cool is that! I think that's the one of the biggest ebook libraries out there. Too bad you need to have a library card to access em.
Compared to the Toronto Library collection, I only see 1085 fiction and non-fiction books
If you are in Toronto, here is the link the library collection.
http://toronto.lib.overdrive.com