Book excerpt: Corporations of every size have experience of employees who are guilty of lying, stealing, sabotage, hacking, destruction of files and data, and more than a few corporations have been, and continue to be, devastated by the activities of whistleblowers. Profits, secrets and staff morale are all threatened. This book provides a background to the psychology of deviance and offers practical advice about identifying the causes of and prescriptions for reversing disloyalty.