I found this book very useful for someone who wants to increase his conversational skills in a short period. You can find lots of expressions organized by topic. It is helpful in the sense that there are words with which you were acquainted at some point, and this book serves to refresh your memory of some forgotten expressions. It's just like entering data to your brain. This book is not intended to entertain you; it is rather in the form of a dictionary, and reading a dictionary is no fun. But if your ultimate goal is to broaden your expressions, this book is an excellent tool.