Though the following book may not be useful for all readers, it is something that both the Californian private investigator and clients (especially attorneys) should read. It is written by David Queen, a tenured federal prosecutor, defense attorney, and licensed private investigator. The book's legal focus makes it very useful guide for assured due diligence in investigative cases. Investigators and clients residing outside of California can benefit from this text by using it as a reference when subcontracting or when an investigation shifts to California legal statute. As a reference book, it can certain assure that the investigator handling a case is operating within the rule of law.
