Over the years informers have been called by many names - rat, snitch, squealer, grass, stool pigeon, mole, dobber, whistleblowers - their job is to dish the dirt on suspected felons. Going right back to Judas Escariot and his betrayal of Christ, this book gives a background of the world's most famous snitches and the different ways of conveying their information under the veil of secrecy. Often seen as vile collaborators, profiteering, targeting victims, working the police and courts for their personal advantage, or betrayer, one thing for certain is that they live the rest of their lives always having to look over their shoulder.