Catalina Books Error - BKAgentServiceErrorDomain error 8

I updated to Catalina 10.5 on MacBook Pro (Retina, 15-inch, Late 2013), and am now unable to open books (ePubs/PDFs alike) via Books. These books are there, I can sync them to my iPad and they open, but they do not open in Books.

The same happens with book downloaded from Books store.

This means all book are in accessable. Thank you Apple.

Books displays with the following error dialog:

The operation couldn’t be completed. (BKAgentServiceErrorDomain error 8.)

The black spinning icon show on book icon indefinitely.

Very frustrating issue, Apple has broken the app. One more thing to add to list of disappointments with Catalina!

Anyway know how to resolve?