Book excerpt: This book has been written for the local police narcotics investigator and those supervising narcotics investigations and operations. It is written from a practical standpoint, describing investigative and operational techniques which have streetproven effectiveness. The book includes basic material in the area of case initiation and development and then builds on and emphasizes these basics, discusses the important areas of techniques and operationsOCoInformants, Search Warrants, Raid Planning and Execution, Special Street Operations and Investigative Situations, Undercover Operations, and Enhanced Investigations. The author has spent over twenty years as a policeman and nine as a narcotics investigator and supervisor. The specific operations and techniques used by narcotics investigators have developed gradually over a number of years. The craft of a narcotics investigator is passed on informally. Through the use of the techniques described throughout this book, the skill, professionalism and ability of investigators to survive, personally and professionally, will be enhanced."