I hadn't heard about the book packager -- so that's three who are culpable, the writer, the editor and the book packager. The last two should know the sub-genre. The agent might be slightly less familiar with the sub-genre, if s/he sells in different fiction markets.

It's still a mess, even at six figures for two books. I wonder if they'll put out another edition -- and will it sell? Can she recover from this and have a career? Will the editor get busted back to the mail room?

Those of us trapped in mid-list h@#l would like to know.