The book "Metadata" by Jeffrey Pomerantz offers a comprehensive introduction to the topic of metadata, which is often seen as the invisible infrastructure for the information we interact with daily. In a time when metadata has come into the public spotlight, particularly in relation to surveillance reports, understanding these concepts is becoming increasingly important. Pomerantz highlights the role of metadata in the modern world and explains how it influences our interactions and the way information is organized and retrieved. The book is suitable for both professionals and interested laypeople, providing a clear and concise overview of the significance and challenges associated with metadata. It is an essential work for anyone involved in technology, IT, and information sciences.