Thanks for the new thread!
Diana is working on the second to last book, which is the ninth, "
Tell the bees that I'm gone". I've understood from the facebook posts that it is nearly finished. Although, looking at the rate she has written things in the past, the last book is probably ready in like 2025
I really hope she doesn't take that long. The books are massive though. I've listened to most of them as audiobooks and the duration is 45hours to 55hours