Reminders of Him question

I have recently discovered that two Amazon subsidiaries, Abebooks.com and The Book Depository.com, are printing and selling my copyrighted books illegally. By illegally, I mean that they are printing and selling my books without paying me a royalty. Amazon tells me they have no responsibility in the matter (although it’s fairly obvious that they gave the digital book files to The Book Depository for on-demand printing).

I have sent letters to Abebooks and The Book Depository informing them of the copyright infringement and requiring them to remove my books from their sites.

Has anyone else experienced this problem? You should know that if you sell books, these sites (and no doubt others) are stealing your work.

Cheryl