I finally launched https://overreader.com today. I had the idea for it in January of 2015 so it only took me 8 years to get off my @$$ and actually get it done. If you use Goodreads and either Overdrive/Libby or Kindle Unlimited, check it out. (or if you have friends that do, please share).

Goodreads Libby/Overdrive
Goodreads Kindle Unlmited