This book is above all, the story of a handful of police officers’ commitment to girls who were victims of a sexual predator. It also chronicles the largest manhunt ever unleashed in Madrid: Operation Candy. In 2014, the Madrid Judicial Police Brigade faced an enormous challenge: a man abducting girls in broad daylight, holding them captive for hours, and sexually assaulting them. This book narrates the hunt for the Ciudad Lineal (Madrid) pedophile from inside, through the eyes of the officers who tracked the shadow for months, finally identifying and arresting him thanks to the victims’ collaboration and innovative investigative techniques. The book includes testimonies from those involved and is based on all the official documents of a case that has become part of Spain’s criminal history.