This is part of #1388, since WordPress has this out of the box:

Note: remember to add these 2 modules on the list in https://backdropcms.org/user-guide/features-added-core once this is implemented:
https://www.drupal.org/project/ckwordcount https://www.drupal.org/project/notification
GitHub Issue #:
1477
Recent comments
I don't think there is currently a way to set back references in bulk for existing books that already reference an author... I believe you can do this with CER through the UI...
Backlinks for Entity Reference?
If choosing the Views approach you can also use https://backdropcms.org/project/eva which allows you to place the list with more flexibility.
Backlinks for Entity Reference?
Thanks. It still took a lot of trial and error for all the settings within the settings, but I eventually got it to display based on these instructions.
Backlinks for Entity Reference?