The article presents a volume on multimedia information retrieval (MMIR), promoted by the Italian Association of Advanced Documentation (AIDA). The volume outlines the state of the art of MMIR, an innovative system of content-based information retrieval to process digital information in multimedia databases. It offers a panorama of multimedia information retrieval issues and challenging research areas and a collections of chapters by international specialists in the computer science and information retrieval community. The aim of the book is to contribute to dissemination of MMIR in Italy, envisioning its potencial applications by public and private organizations in a variety of fields within the documentation area. For technically inclined readers dealing with information systems, artificial intelligence, image and audio processing, computer vision, human-computer interaction and high performance computing, the book will provide a deeping lecture on familiar topics.