This is a guidebook on the fundamental aspects of Islamic criminal law. Using classical and contemporary sources and providing information about different schools of law in Islam, the author underscores the agreements and disagreements regarding Islamic criminal law. In the first part, he discusses various types of crimes and punishments, such as murder and incarceration. In the second part, he goes into the provisions of their application, such as statute of limitations and citizenship. In the final part, the author discusses factors affecting criminal law enforcement, such as mental illness and amnesty.