Over the past four decades, I have managed numerous cases around the world—cases involving a wide variety of domestic and international businesses and myriad fraud types. Yet, there is a common thread running through virtually all of them: Red Flags. Before being discovered, just about every one of my cases had multiple indicators of fraud that, if addressed when first discovered, might have saved millions of dollars in losses and the untold pain that major frauds leave in their wake. How to spot and take action on Red Flags in an effective manner is the subject of this book by Rod Stamler, Hans Marschdorf, and Mario Possamai. It grew out of Rod’s seminal work in the early 1990s, just after he retired from the Royal Canadian Mounted Police (RCMP) and joined my forensic practice. The Auditor General of Canada—roughly the Canadian equivalent of the US Government Accountability Office—had asked him to prepare a guidance document on how fraud can be detected much earlier in the fraud cycle.