As of the date of this blog post the Merriam-Webster Fifth Edition of The Official SCRABBLE Players Dictionary will be the official dictionary for TSSC. More than 5,000 new words have been added to the dictionary making them officially playable in the game. You can read more here: http://goo.gl/2sLk49
The dictionary is available at Amazon where they also have a version for the Kindle: http://goo.gl/7mm7Jb
