The Encyclopedia of Materials: Science and Technology (EMSAT), edited by K.H. Jürgen Buschow, Robert W. Cahn, Merton C. Flemings, Bernhard Ilschner, Edward J. Kramer, and Subhash Mahajan, is a comprehensive 11-volume set with over 10,000 pages. It succeeded earlier works like the 1986 Encyclopedia of Materials and the 1994 Encyclopedia of Advanced Materials. EMSAT features 1,795 articles by over 2,000 contributors, covering all aspects of materials science and technology. Reviewers from General Electric Research and Development Center praised its breadth, authority, and up-to-date content, with particular strengths in polymer science, amorphous materials, biomaterials, and superalloys. The encyclopedia is organized into four main categories: materials, properties, synthesis/processing, and applications. Articles are arranged alphabetically, though this sometimes led to poor clustering of related topics. The Thematic Guide in Volume 11 helps navigate the content, but individual volumes lack subject indexes. Articles vary in length and include illustrations and tables, though some topics lack introductory overviews. The coverage is extensive, but some important areas are missing, such as the history of the field, resistance welding, and hexagonal boron nitride. Cross-referencing and bibliographies are inconsistent, with many articles failing to link to related entries. The electronic version offers more color images and multimedia, but updates are limited. The final volume includes extensive indexes, though it has some flaws, such as missing contributors. Overall, EMSAT is an indispensable resource, though a revised edition is needed to address its shortcomings.The Encyclopedia of Materials: Science and Technology (EMSAT), edited by K.H. Jürgen Buschow, Robert W. Cahn, Merton C. Flemings, Bernhard Ilschner, Edward J. Kramer, and Subhash Mahajan, is a comprehensive 11-volume set with over 10,000 pages. It succeeded earlier works like the 1986 Encyclopedia of Materials and the 1994 Encyclopedia of Advanced Materials. EMSAT features 1,795 articles by over 2,000 contributors, covering all aspects of materials science and technology. Reviewers from General Electric Research and Development Center praised its breadth, authority, and up-to-date content, with particular strengths in polymer science, amorphous materials, biomaterials, and superalloys. The encyclopedia is organized into four main categories: materials, properties, synthesis/processing, and applications. Articles are arranged alphabetically, though this sometimes led to poor clustering of related topics. The Thematic Guide in Volume 11 helps navigate the content, but individual volumes lack subject indexes. Articles vary in length and include illustrations and tables, though some topics lack introductory overviews. The coverage is extensive, but some important areas are missing, such as the history of the field, resistance welding, and hexagonal boron nitride. Cross-referencing and bibliographies are inconsistent, with many articles failing to link to related entries. The electronic version offers more color images and multimedia, but updates are limited. The final volume includes extensive indexes, though it has some flaws, such as missing contributors. Overall, EMSAT is an indispensable resource, though a revised edition is needed to address its shortcomings.