I'm surprised your publisher didn't take advantage of major snowstorm season and release the books in WINTER. Unless, of course, you're in a different hemisphere. Even then, the U.S fall season is nobody's Winter. ;)

Well, they come out just *before* winter here (US), so that allows for a nice transition into the snowy season! 

Book 3 will deal more with the Autumn Kingdom, so that book will definitely fit the fall release date!