I joined the DC library using their online form
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.
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.
Hope this helps?