It has. I received mine this morning from Gamestop. One of the official distributers of the game. The DLC hasn't been released. The Collectors Edition has been shipped according to Bungie & Activision's time plan. It has been released. The Taken King itself hasn't.
English
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It releases at 12 am eastern 9/15/15. TTK releases at reset.
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The game does, the book you hold in your hand, you already hold in your hand.