How funny that you mention them while I'm reading them too! The treasurer where I work recommended them to me, she said the church library had most of them so I checked them out. I've read books 1-6, the church didn't have #7 so I ordered it from paperbackswap. When I finish it I'll donate it to the church library.
It's good to hear the reviews of some of the other books, I wondered if they were worth my time.