This is another series of requests that were on UserVoice with 10 to 24 votes and were dropped with the move over to FeedBear. It's discouraging how often that happened. [:(]
It is also yet another significant author where Logos has quite a number of books about him, discussing his theology and so on, without having any works by him.
These are the ones I would chiefly recommend Faithlife get. All of them are available in that other...ahem...digital format from that large online vendor that will remain nameless.
Links are to the page on the feedback site where you can vote for them.
And one that's not available in Kindle, but is oh so important!
Others also available in Kindle but not as high a priority:
https://feedback.faithlife.com/boards/logos-book-requests/posts/the-prophets