I already had the 2011 edition which was already damaged as widely used in our parts of scrabble. Does not contain all the words in dictionaries, but only those that the less used or even unknown to most people. Contains also for "large letters" as K, Q, W, X, Y, Z, all small words 2.3 or 4 characters exist. Ditto for the combinations between two large letters. Indispensable!