@Eileen, without the infrastructure of Overdrive, I don't know how the libraries
could.
@CWatkinsNash, Overdrive is really coy about the 5 titles thing. When they said I didn't have enough to join, I asked "I should have 6 titles by the end of next year, can I then?" and they said that wasn't enough to join at that time. That's when I said, well how many is it please? and they never responded.
Another indie and I are trying to do this under a publishing label I set up, but even between the two of us we could only poll maybe 10 titles in 2 years. If that's not enough for Overdrive, that will be a bummer.
Honestly, once in Overdrive, I'd just as soon price the book for free to libraries and see if any of them take the bait. For me it's one part advertising, one part charity.