Actually, I think they only offer a way to request the one title that Overdrive/Maine InfoNet has heard of (I put a couple hours in on this in the last day, in between other things, so I'm not crystal clear on anything at the moment, except I remember why I loathe Overdrive).

I have not, however, discovered any way to request a title that Maine InfoNet/Overdrive never heard of. For instance, Alliance of Equals by Sharon Lee and Steve Miller, or Carousel Tides, by Sharon Lee. I was able, with a lot of fuss and fuming, to request Devil in a Blue Dress, but that was because the title was in the database, though the book was not available.