There are 256 pages in this book. This is an encyclopedia. An encyclopedia is a book or numbered set of books containing authoritative summary information about a variety of topics in the form of short essays, usually arranged alphabetically by headword or classified in some manner. An entry may be signed or unsigned, with or without illustration or a list of references for further reading. Headwords and text are usually revised periodically for publication in a new edition. In a multivolume encyclopedia, any indexes are usually located at the end of the last volume. Encyclopedias may be general (example: Encyclopedia Americana) or specialized, usually by subject (Encyclopedia of Bad Taste) or discipline (Encyclopedia of Social Work). This book was published 2010 by DK Publishing (Dorling Kindersley) .

The author, Ian Graham, is a full-time writer of books and magazines, specialising in technology. Joe Fullman is an experienced children's author and has written many non-fiction reference titles. He lives in South London. Dr Stephen Scoffham is a Visiting Reader in Sustainability and Education at Canterbury Christ Church University. He is the author of many texts for children and teachers on primary geography and has won awards from the Geographical Association for his publications for the past two years running (2014 and 2015). Stephen has been an elected member of the Geographical Association's governing body since 2011. Isabel Thomas is an experienced author of non-fiction books for children and has written many articles for national newspapers including The Guardian and The Times.