Convert all "The Artist" to "Artist, The"

Hi all!

First off, MP3Tag is a lifesaver! thanks so much for putting in all the effort.

I'd like to convert my entire music collection from things like "The Books" to "Books, The".
I understand I would need to write an action for this, but how would I formulate this action?

Thank you,

Use action type "Replace with regular expression"
Here's what you must enter:
Regular Expressions
(might have to scroll up a little)

Thank you so much!