Today, Nintendo will release Professor Layton and the Last Specter in North America. As with all previous games, you’ll be able to download new puzzles for free over Wi-Fi every week once the game is out. In America, this service will begin on October 23rd.
Nintendo of America also mentioned worldwide sales for the Professor Layton series; they say games in the series have sold over 12 million copies worldwide.
Europe will get the game as Professor Layton and the Spectre’s Call on November 25th, sans the London Life RPG mode.