Gwinnett Public Library has 1) ebook fiction 661, 2) Non-fiction 822. The breakdown on fiction is Sci/Fi/Fantasy 68, Romance 124, Mystery 285, Suspense 122, Teen 61 and Literature 50 total comes out to 710 so I guess a few are in more than one catergory. Plus they have over 15,000 public domain books that have no DRM if you don't know how to get them yourself.

There is an entire section on teaching you what readers are compatible and how to set up your computer.