Plant-Derived Drugs and Drug Repurposing (Volume - 2), edited by Dr. Kavita Chahal, delves into the expanding field of phytopharmaceutical innovation with six compelling chapters highlighting marine natural products, cytotoxic medicinal plants, sulfur-derived pharmaceutical groups, and vaccine development from plant sources. This volume discusses novel anticancer drugs from marine organisms, apoptosis-inducing plant compounds, the role of sulfur in therapeutics, modern trends in drug nomenclature and chemistry, and the potential of plant-based vaccines. Featuring extensive research and case studies, it offers valuable insights into pharmacologically active compounds, bioengineering strategies, and the integration of ethnomedicinal knowledge with modern drug development. The book is an indispensable resource for pharmacologists, botanists, molecular biologists, and researchers involved in drug discovery, offering a blend of traditional medicinal wisdom and contemporary scientific validation.