September 26, 2005
In the North American version of Another Code: Two Memories, on the bookshelf in the Silver Bird Room, containing the "N Book", there also is a red book with an "X" on it. By clicking on it, it will be revealed to be called "The Legend of Zelda Chronology". This is likely a reference to the highly debated Timeline of the Zelda series.
Copyrights for both series are held by Nintendo.