Instruct: Classify the given review as either positive or negative.
Query: Charts, charts, charts...but what's up?

This book talks about statistical approach to horse racing by evaluating the frequency and return of each type of bets. However, the explanations of those statistical findings are not enough. I believe if the statistical finding tells you something, we should still need to understand the rationale behind and why statistical finding comes out like this.The second half of this book is all charts in resepct of findings from different race tracks in the US, which however need readers to digest and evaluate what's inside. There is even no explanation of why the charts look in this way. In other words, half of this book only contains a presentation of data without really goes deep to analyse what's happening. This book is not good enough.