In “Radio-active Substances,” Marie Sk≈Çodowska Curie presents a groundbreaking exploration of radioactivity, a term she helped to define. The book is both a scientific treatise and an insightful narrative that unveils her meticulous research methodologies, ongoing experiments, and her pioneering work with radium and polonium. Using a clear and approachable literary style, Curie's text is framed by the era's scientific revolution, characterized by an insatiable curiosity and a quest for knowledge. The intersection of chemistry and physics serves as the backdrop for her discoveries, marking a pivotal moment in the understanding of atomic science and its implications for the future. Marie Curie, the first woman to win a Nobel Prize and the only person to win Nobel Prizes in two different scientific fields, was deeply influenced by her background in physics and mathematics. Her tenacity and radical approach toward an underrepresented field in science stemmed from her own experiences navigating a male-dominated academic world. Curie's scholarships and research were propelled by her passion for discovery and her desire to harness scientific findings for the betterment of humanity. “Radio-active Substances” is a must-read for anyone interested in the origins of modern physics, the history of scientific thought, or the powerful contributions of women in science. Cited as a foundational text in the field of radiochemistry, Curie's work not only enriches our understanding of radioactivity but also serves as a testament to the enduring pursuit of knowledge against all odds.