I feel I must correct all the other reviews of this book given to date which criticise it's use of American words, and removal of any words possibly deemed offensive.
In Britain, Scrabble is played by Chambers' "Official Scrabble Words", based upon the latest edition of the Chambers Dictionary. In the US they base their word list upon Merriam-Webster's Dictionary, and all club and tournament games are played using the contents of that lexicon, but without any possibly offensive words.
Hence, the contents of the OSPD (this book) are the exact words allowed in official games of Scrabble in America - like it or lump it, that's the way the Yanks play it.
This book should not really be bought or used by anyone outside of the US - players in Britain should use Chambers' Official Scrabble Words instead, since this is the official British word source.