Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Difficult to follow

I purchased this book as a Chemistry review for an entrance exam. It has been many years since I've taken Chemistry and needed a quick refresher so I could pass this section on my test. I find the book very hard to follow, and does not explain formula calculations as in depth as I would expect. There are many times where I catch myself staring at the problem solution and have to back track to understand how they came up with their answer. The definitions are over-worded and hard to understand. I've had to get online and look up definitions for the laws over and over again because the way they word them, they just don't make sense. Maybe I am under-qualified for this book, but I would think a review book should be broken down in an easier format. I wouldn't waste your time on this book.