Missing?????

Over the weekend I was horrified to find that Susan Brown's Football Girl 1&2 and Changes are no longer listed on Amazon\Kindle. (UK)

While this isn't an issue for me as I have those books, I was looking for a friend, on both their KINDLE device, smartphone kindle app and Laptop

Is Susan alright?

I ask only as last time this happened to me was when "The Last of the Fey" dropped from Amazon\Kindle lists, while Denise's estate was being taken care of.