John Hartley's A-to-Z guide navigates over 230 specialist terms and concepts across communication, culture, and media studies, helping readers bridge disciplinary boundaries with clear, accessible explanations. This comprehensive reference provides concise explanations of both traditional concepts and emerging terminology – from artificial intelligence and blockchain to memes and the metaverse. Each alphabetically arranged entry reveals a term's origins, applications, and points of scholarly debate, supported by over 800 references. Readers can explore at their own pace, starting from any entry point, gaining deeper understanding of complex theoretical frameworks while discovering connections among seemingly disparate fields. This guide is essential for both students and seasoned scholars in media studies, communication, cultural studies, and related social science disciplines. Instructors can recommend it as an invaluable resource for courses requiring theoretical literacy, while researchers working across disciplinary boundaries will find it valuable for clarifying specialized terminology.