I'm making the move for several reasons: sales are very, very slow outside of Amazon. I'm finding retailers hiding my books even from title searches.
Also, retailers like B&N and Kobo are removing books with sexual content without notice or reason. All my books are labelled but from what I see, that doesn't seem to matter if you're an indie author.
I don't want to be caught out, so I'm taking a risk and putting the Prydain books into Amazon. If it all goes pear-shaped, I'll rethink the decision.
If you already have a Prydain novel, it should stay in your library. But if you haven't yet bought them, and you're not an Amazon customer, be quick and snap them up now!