Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: WMD Perspective Behind the Times

Mr. Campbell's work, written as part of his current doctoral thesis at Hebrew University, falls behind the times regarding the rapid paced developments in the field of weapons of mass destruction. His socio-scientific approach stems from this works academic research requirement which was spun off as a coffee table book treatment of this important field. Well researched concerning nuclear weapons, but falling seriously behind in his regards concening biological or chemical weapons. I would recommend this book for those that need a very, very basic, primer concerning nuclear weapons but nothing more.