I joined the DC library using their online form
http://www.dclibrary.org/services/getacard
and received a member number immediately in my e-mail that was good for 30 days. To keep it going after the first month, though, I was supposed to present myself at one of the DC libraries with ID to get a physical card - and since I live in NC that was not going to happen, so the membership lapsed. During that short time I was able to borrow some nice mystery genre ebooks and added more to my wishlist, so if you do have access to DC I would highly recommend this as an option.
http://freelibrary.lib.overdrive.com...owseeBooks.htm
The Volusia County FL library also lends ebooks (epub and audiobooks), so if you have family there (Daytona Beach area) it would be worth checking out.
http://overdrive.volusialibrary.org/...en/Default.htm
Hope this helps?