The book "Investigation of Solid-State Diversity of Amantadine Hydrochloride" offers a comprehensive study of the various solid forms of amantadine hydrochloride. It highlights the potential for the formation of co-crystals and the generation of new solid forms through the use of selected solvents. The authors, Shashidher Burra and Padamati Sudhakar Reddy, employ advanced methods and equipment to analyze the structure of these new polymeric forms. Techniques used include single-crystal X-ray diffraction, powder X-ray diffraction, and differential scanning calorimetry. The results reveal interesting patterns and changes in structure identified under different temperature conditions and analyses. This specialized book is aimed at scientists and professionals engaged in solid-state chemistry and materials science.