Organised crime is broad in the types of harms and severe threats to health, safety, and welfare that it can inflict upon individuals, families, and communities. These threats are expressed in countless illegal practices, such as corruption and bribery; murder and other violent crimes; gun violence; drug trafficking; cross-border illicit trafficking of people; illegal car theft and trafficking; assorted scams; forgery and counterfeits; money laundering; robbery; blackmail; metal theft; loan sharking; illegal gambling; acts that threaten public safety or public order; illegal trading weapons; and trafficking in stolen property. This edited book entitled Transnational Unconventional Organized Crime: Thematic Perspectives seeks to explore and understand the complexity associated with the wicked problem of transnational organised crime and unconventional crime, offering a comprehensive examination of how organised crime has adapted and expanded in a rapidly interconnected world.