This academic book by Dr. Ibtisam Marhoon Al-Saffar offers a modern critical perspective on the methodologies of investigation and literary criticism. It delves into the theoretical foundations and practical applications of contemporary critique, analyzing a wide range of texts from both classical heritage and modern literature. The work aims to provide researchers and students with precise methodological tools for understanding, analyzing, and evaluating texts, while highlighting recent developments in literary and critical studies. It is an essential reference for specialists in literary criticism and manuscript verification.