So 39 was Professor Layton and Pandora's Box. The game takes the whole principle of the first game and makes it bigger and better than before. If you haven't played it yet then I won't spoil the ending, but it's great!
Speaking of which, my 38 is a direct sequel to another game on my list. And when I say "Direct Sequel", it's the first time in the series that there was a direct sequel!