Criminal Procedure Under the Bharatiya Nagarik Suraksha Sanhita, 2023 (A Textbook From Investigation to Appeal) by Dr. Nidhi Saroj is a practical and comprehensive guide to understanding the criminal procedural framework under the Bharatiya Nagarik Suraksha Sanhita, 2023 (BNSS). Covering every stage of criminal proceedings—from the registration of an offence and investigation to trial, judgment, sentencing, appeals, and other post-trial remedies—this book presents the law in a clear, systematic, and reader-friendly manner. Written for law students, judicial services aspirants, advocates, police officers, academicians, and legal professionals, the book explains the provisions of the BNSS with clarity while highlighting the major reforms introduced in India's criminal justice system. Comparative references to the erstwhile Code of Criminal Procedure, 1973 (CrPC), along with practical illustrations and procedural insights, help readers understand both the legal framework and its real-world application. Whether used as a classroom textbook, an examination resource, or a professional reference, this authoritative work by Dr. Nidhi Saroj provides a reliable and up-to-date understanding of criminal procedure under the BNSS. It is an indispensable resource for anyone seeking a thorough grasp of India's modern criminal procedural law.