P.I. Books

Here's a couple of cool P. I. books...

P. I. Books - This ready reference is for anyone interested in investigations. Readers in and out of the law enforcement field will find this book easy to use and understand when seeking explanations about a wide variety of investigative topics including: constitutional law, documentary evidence, interviewing and interrogating, and surveillance. P. I. Books.

P. I. Books - Most private investigators are ordinary citizens just like you - except they know how to locate information and people. And so will you after you read these P. I. books. 

A PI is only as good as his techniques, and P.I. School teaches you everything you need to know:
surveillance, paper trails, interrogation and more.