Undercover: Police Surveillance in America by Gary T. Marx (Author) December 1989 Paperback $31.95, £27.00|eBook $31.95, £27.00
Speaking Truth to Power: Confidential Informants and Police Investigations by Dean A. Dabney (Author), Richard Tewksbury (Author) August 2016 Paperback $29.95, £25.00|Hardcover $85.00, £71.00|eBook $29.95, £25.00
