The battlespace has moved inside the mind. Conflict no longer begins with force. It begins with perception. Algorithmic systems now determine what people see, how often they see it, and how it is interpreted. These systems operate continuously, shaping attention, reinforcing patterns, and influencing decision-making long before individuals are aware of it. Algorithmic Cognitive Warfare examines how data, artificial intelligence, and distribution systems have transformed influence into a continuous, adaptive process. This book breaks down: How algorithms structure perception and control exposure The operational stack behind modern influence systems The cognitive loop and how behavior is shaped over time Precision targeting and individualized influence Information control, narrative warfare, and social engineering The collapse of shared reality in fragmented information environments Defensive strategies for cognitive security Rather than focusing on surface-level content, this analysis examines the systems that shape interpretation itself. Influence is no longer applied. It is embedded. Understanding that shift is no longer optional.