There are 352 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 2009 by DK Publishing (Dorling Kindersley) .

David Roberts was born in Liverpool. He studied fashion and worked in the industry for several years before going on to illustrate children's books. He has also published Dirty Bertie with Little Tiger Press. Phil Wilkinson is a freelance writer and the author of 50 books, as well as being a dad of two. He is a contributor to a number of parenting sites, including the Huffington Post, writing about education, bullying, sex education and teenagers. Roger Bridgman studied Natural Sciences at Cambridge, but worked for several years as a graphic designer. After studying electronics, he became a design engineer at Marconi. Roger was Curator of Communications at the Science Museum for over ten years, during which he wrote DK's Eyewitness Science: Technology and gained an MSc in History of Technology at Imperial College, London.