This handbook consists of essays on contemporary issues in criminal law and their theoretical underpinnings. Some of the essays deal with the relationship between morality and criminalization. Others deal with criminalization in the context of specific crimes such as fraud, blackmail, and revenge pornography. The contributors also address questions of responsible agency such as the effects of addiction or insanity, and some deal with punishment, its mode and severity, and the justness of the state’s imposition of it. These chapters are authored by some of the most distinguished scholars in the fields of applied ethics, criminal law, and jurisprudence.