Topics of interest to those interested in starting (or, like me, researching) a private investigation business.
There was no way this book was going to cover everything I wanted it to cover, but let's say that for a writer this was a good primer on running an investigation firm, both on the paperwork side and in topics like interrogations, interviews, looking for patterns of losses to determine thefts, loss prevention, etc. I don't feel like the book was well organized, though, and it felt like I was missing things as the topics jumped around. But that's a minor quibble.
Recommended if you're trying to find out if you're interested in private investigations/security work, or are a writer researching same.