Criminal Law refers to a body of law that defines criminal offenses, regulates the apprehension, charging, and trial of suspected persons, and sets penalties and modes of treatment applicable to convicted offenders. This category encompasses legal theory and systems, including the principles underpinning the law and the processes that contribute to the establishment of laws. It also covers law books, typically non-fiction, which offer comprehensive information on legal codes, procedures, and case studies in the field of criminal law.