Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: A Reference Book for Investment Dummies

This book is suitable for mature adults as well as for youngsters. It presents the basics in a clear, concise, amusing way. After many years of feeling confused and inadequate I now feel able to understand what my investment advisor is talking about. Further, I am now equipped to ask meaningful questions. This book will be a reference book that I can return to frequently.