Are you looking for the Windows version or???
You can get 3.6.0.0 at WineHQ or Googling other sites (I'd post a direct link, but the last time I did something similar to a third party site a Mod scolded me). Can't recall how old it is, but I've had it installed for at least a couple of years so 2017 or older.
I thought it was still the version you get from OD directly at
https://app.overdrive.com/downloads/...nsoleSetup.msi since they seem to want to push folks towards their Win 8/10 app instead, but you didn't really give any details to what you had installed so this may be what you already have.