The enigmatic nature of disappearances has captivated human curiosity for centuries. While many disappearances are eventually solved, a significant number remain shrouded in mystery, defying conventional explanations. This book delves into the unsettling phenomenon of disappearances linked to geographically significant locations, often referred to as "devil triangles" or bearing other ominous names. We will explore a pattern that transcends cultural boundaries and geographical limitations, weaving together detailed case studies with rigorous geographical analysis and anthropological insights. The research of Ivan T. Sanderson, whose work on "invisible residents" and geographically concentrated anomalous events serves as a crucial foundation, will be explored in depth. We will examine his methodology for identifying these areas and analyze his key arguments regarding clustering of unexplained events. Equally significant is the research of Loren Coleman, who has extensively documented the correlation between ominous place names and the occurrence of disappearances. We will explore whether these names reflect pre-existing anxieties or somehow contribute to a heightened sense of unease, influencing the perception of risk and the subsequent reporting of events. Furthermore, the work of David Paulides on the Missing 411 phenomenon will be integrated, highlighting the striking similarities between these cases and those occurring in areas with devil place names. By combining rigorous investigation with an open mind, we aim to shed light on these perplexing events, raising questions about potential patterns and underlying explanations. At the heart of this dark mystery lies The Devil's Code.