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Review title: Don't buy this book used!!!!!!!
Product review: The book requires the user to take an on-line preference test to determine your "strengths". The publisher controls the process by printing a code on the inside of the jacket cover. Once the code is used, it cannot be reused. Thus, anyone who buys the book from someone who has already used the code to take the test will be unable to take the test. The book is almost worthless without the ability to take the online test.
