"It’ll go for as long as the volumes sell sufficiently to continue, as with everything." I realize the world isn't perfect and you can't print what doesn't sell, but I think it's worth noting that the fact that you guys never complete your "complete" collections has become a deterrent to people picking up the early volumes. (I say this as a retailer, not my personal purchases). It's sort of become a self-fulfilling prophecy. People know they're only getting half the story so they don't bother.