The first edition of this book was published in 1992, and the second edition in 1997. Both editions, hardback and paperback, have been highly successful and have sold many, many copies. In addition, the book has been translated into Chinese (Cantonese and Mandarin), French, Indonesian, Portuguese, and Spanish. We are delighted that so many readers in various countries have found this book useful. Now, the entire book has been updated for the third edition.