A Straightforward Guide to The Crime Writer''s Casebook, Third Edition, is a reference work for all crime writers and is an essential companion for research into modern police procedure as well as to crime investigations in history. The book is unique in presenting the topics by means of both first-hand explanations by a London police detective and a crime historian. There are also glossaries explaining legal terms encountered in crime history and of modern police work. A new chapter includes the use of Artificial Intelligence into police work.