As the title suggests, the book lists the most common interview questions. If you have no idea what those questions are, then you might find the book somewhat helpful.
Along with each question there is an example answer which usually does not apply to the reader. After each example answer there is a brief snippet about how you should try to to answer that type of question. Unfortunately, these snippets are far too brief to be of much help to the reader (some are a single sentence). If there were more emphasis put on how to answer the question, and less space given to the example answers, I think it would have been a more useful book.
I suggest "the Unofficial Guide to Acing the Interview" by Michelle Tullier, published by Hungry Minds. This book will help you get into the proper frame of mind for your interview. It will also help you understand the employer's underlying concerns behind those tough interview questions. When you know why the employer is asking a question, you can form your best answer.
Good luck!