The world of Ten-Ghost, Sky Crossing, and Spider People! See those continents in the northwest section of the map? That's where those books all take place. This thing is huge, by the way. Warning.
I will also be signing copies of Ten-Ghost at Half Off books in Orange City, FL on March 16th from noon to three. I'm all excited. Also a little bit freaking out. Should be ok, though. It's a nice store, has that old-school library feel to it.