I've retired from audiobook narration, but will continue to do the Lord John books as they emerge because I just LOVE them!I'm very glad to hear that he will continue to do the narration for any future Lord John books or stories. Diana Gabaldon has said that his voice for Lord John sounds exactly like what she hears in her head.
Here's a very interesting interview from a few years ago where Jeff Woodman goes into some detail about what it's like to be an audiobook narrator.
UPDATE 2/19/2017 7:10 pm: Jeff Woodman has been posting some very interesting comments in the thread on Compuserve. I would really encourage you to take a look.
If you've never listened to the Lord John audiobooks, I would definitely recommend them!