I'm not a huge fan of the Amazon imprints, except to encourage and hope for more reprints of backlists such as Gladys Mitchell, the Saint books, etc, but Amazon Crossing does have promise...There was a good amount of press recently during the Frankfurt Book Fair - here's one article that seems to show they're doing all right and moving forward with the concept. (I had also seen another article that detailed the Finnish crime books they're featuring for the coming year but I can't find it at the moment.)
http://publishingperspectives.com/20...treasure-hunt/