I teach literacy to adults and the students often ask me to recommend a book for independent work on spelling. From now on, this is the book I will recommend. I have access to numerous spelling books, all of which have their strengths and weaknesses. This one, however, is so clearly set out, comprehensive and helpful, with plenty of opportunities for practice and hints for learning, that I think it covers all the main requirements. In addition, its pages are attractive and uncluttered, which, in my opinion, are essential features of a good self-teaching book. If you can only have one book on spelling, then this is the one.