John Madinger, "Confidential Informant: Law Enforcement's Most Valuable Tool", CRC Press | ISBN 0849307090 | 1999 Year | PDF | ~1 Mb | 346 Pages
| “ | Confidential Informant: Understanding Law Enforcement's Most Valuable Tool explores the covert and clandestine world of informants revealing the secrets of how to find them and make the most out of them, while at the same time, avoiding the pitfalls of dealing with them. | ” |