I guess I have to give at least one star. I was a 5star rated seller on Abebooks for 20 years, but I had a book that was very small and was able to ship as a 'letter' and apparently the USPS doesn't scan those so they accused me of entering an incorrect tracking number. As far as I know the customer got the book, there was no claim. But you can no longer buy my excellent inventory of books and I can't sell them to you.