Brilliance Audio, an audio book publisher owned by Amazon, has recently withdrawn its titles from OverDrive. Is this a coincidence or bleed over from OverDrive e-book withdrawals by major publishers? Amazon also owns Audible, a much larger and more stalwartly digital publisher of audio content. It’s possible that the withdrawal is related to a possible merger or Audible hosting of Brilliance content. The INFOdocket article on the subject also suggests the possibility that Amazon will offer these titles with Prime lending.
For digital vs. analogue, I'd like to consider the e-book bleed over possibility. Audio book content well preceded e-books in the digital lending sphere and emerged with fewer splashy management issues. It’s interesting to see something like this now and it makes me wonder if the recent e-book drama has caused audio book publishers to rethink their relationships with public libraries.