Textbook of Eponymous Physical Signs & Markers: Respiratory Medicine is a need-driven clinical and medico-legal atlas created for a time when respiratory diagnosis is increasingly dependent on imaging and laboratory data, yet litigation frequently centers on what was heard, percussed, observed, or documented at the bedside; assembling more than 350 classical and rare pulmonary signs—from Abrahams’ Sign to Woillez’s Sign—this volume restores structured clinical observation as the first safeguard against missed tuberculosis, overlooked pleural effusion, undetected lung malignancy, interstitial lung disease progression, occupational thoracic syndromes, and airway compromise, integrating historical origins, pathophysiological interpretation, bedside elicitation technique, differential implications, and documentation standards into a single coherent reference; designed for pulmonologists, intensivists, thoracic surgeons, postgraduate trainees, hospital libraries, medico-legal consultants, and pharmaceutical safety teams, each entry connects discovery, clinical relevance, risk stratification, and forensic defensibility, reinforcing that subtle findings such as altered breath sounds, shifting dullness, tracheal deviation, or accessory muscle use can define both outcome and liability; in modern practice where delayed recognition of respiratory distress, misinterpretation of chest findings, or incomplete documentation may escalate to courtroom scrutiny, this book equips clinicians to observe precisely, record comprehensively, correlate intelligently, and defend confidently; more than a historical compilation, it is a contemporary diagnostic safeguard that re-establishes bedside pulmonary examination as an essential instrument of patient safety, postgraduate excellence, institutional credibility, and medico-legal protection in respiratory medicine.