The Post-Truth Immune System: Building Cognitive Defenses Against Reality Manipulation is a survival manual for the information age. In a world where facts are contested, narratives are weaponized, and digital platforms profit from confusion, this book equips readers with the intellectual "immune system" needed to resist deception. Blending epistemology, logic, digital literacy, and information hygiene, it offers practical strategies to recognize misinformation, dismantle manipulative narratives, and reclaim autonomy in the post-truth era. Positioned as a vaccine for the mind, it provides survival gear for the information apocalypse-arming individuals and communities with resilience, clarity, and ethical courage to defend reality itself.