I looked at The Book Depository site and did a search. It seems that Onet's Tale, Blood Contract, The Devil Came East, KnorraSky and Page Dancers and are available. The others are not.
There is no reason for this since all of our titles are handled the same way. There must be more to it. I contacted our printer about this. I await their answer. When I get it I will send that answer to The Book Depository.