Practical Instruction for Detectives: A Complete Course in Secret Service Study

"Practical Instruction for Detectives: A Complete Course in Secret Service Study" by Emmerson W. Manning is a guide on the methods and techniques used in detective work, written in the early 20th century. The book aims to instruct aspiring detectives on various aspects of their profession, focusing on practical applications and the development of skills necessary for success in the field. It explores the growing need for trained detectives in a time when crime rates were increasing and discusses the importance of various investigative methods to effectively combat crime. The opening of the book sets the stage by emphasizing the shortage of capable detectives in society and the need for individuals with average intelligence and good common sense to fill this gap. Manning shares his extensive experience working with significant private detective agencies, outlining the necessity of comprehensive training for aspiring detectives. He outlines the diverse types of criminal activities that require detection, stressing that a well-trained detective can successfully unravel complex cases. The preface establishes both the urgency of the topic and the scope of the methods that will be covered in subsequent chapters, which delve into specific techniques, such as shadowing and investigating burglaries.