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Best Choice Michael O'Mara Books 
The Private Investigator Puzzle Book: Over 90 Puzzling Cases to Crack Best Value Independently published 
How to become a private investigator: Break into the industry with little or no experience Audible 
Introduction to Conducting Private Investigations: Private Investigator Entry Level (02E) CREATESPACE 
The private investigator: Beginner's guide Independently published 
The Private Investigator’s Field Guide: Strategies and Checklists for Every Case Be Amazing Productions, LLC 
51 Weird Private Investigator Tricks That Actually Work: How to Trick, Track, Find and Follow Someone Like a Pro Independently published 
How to Make Money as a Private Investigator: Essential Tactics Guaranteed to Boost Sales! 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