The present book "The Law of preventive Detention" authored by Dr. Ashutosh, who himself is a practicing lawyer in this field, is a comprehensive book on the subject and would be of great assistance to both advocates and non-advocates alike. In fact the book contains a specific chapter on the subject "Is Preventive Detention Law necessary", which deals with this sensitive issue with lucid examples. Yet another chapter, dealing with judicial approach towards preventive detention law, reflects shift in this approach of the judiciary towards the detenu, who is deprived of his personal liberty without trial, simply on the basis of subjective satisfaction of the executive.