Sloppily written, poorly organized and inaccurate. I'm a quick study and a good test taker, but I was unable to derive meaningful information from many of the chapters. The material was not presented in a way that lent itself to learning and memorization and was instead more or less a regurgitation of facts in no particular order. The programs included on the CD that came with the book did not work correctly. I could answer one or two flash card questions and then the buttons to move forward or backwards stopped working and I had to start over. I contacted the publisher for a replacement CD but never received it. Examples in the text and answers to many of the questions are wrong: 4 * 4000 = 18000 in one case, 24000/14400 = 9600 in another. These inaccuracies are glaringly obvious. What about the ones you don't catch? Unfortunately I already shelled out the money for this book. I'm putting it on the shelf (or in the trash) and buying one of the other books recommended on this site.