The reading comprehension portions are very low quality. There are too many passages/questions that contain vague language. When the test taker is asked to interpret vague language, getting the correct answer becomes like rolling the dice since, when there are multiple ways to interpret vague language, you just have to pick one of the possible interpretations and hope for the best. The reading comprehension portions need to be edited so as to remove the portions that contain vague language.
If you are looking to buy this book to practice reading comprehension, I DO NOT recommend buying this book.