As I mentioned recently, Amazon-KDP has for the second time shut down my account, which means that my self-published books are mostly no longer available. The exceptions I know about are the Kindle of The Machinery of Freedom, which was put up on Amazon by my agent not by me, the print copy of Legal Systems Very Different from Ours, which I put up on Barnes & Noble the first time this happened, and any kindles that Amazon hasn't yet noticed and taken down.