The most trusted nonfiction series on the market, Eyewitness Books provide an in-depth, comprehensive look at their subjects with a unique integration of words and pictures.

Full-color photography is paired with clearly written text in this exciting first reference book about the world of castles and knights.

online encyclopedia containing over 110,000 entries organized topically, written and published by Matthew Probert under the name Probert Publishing. It has unusual search functions which create pages containing the text of all the articles matching the search, rather than giving a list of results. The Probert Encyclopaedia was first published in 1993 as a knowledgebase for artificial intelligence systems and has subsequently been developed to include the topics omitted by other encyclopaedias. It was available as downloadable freeware until the 18th edition.

 Welcome to the Sahara in Africa, an arid desert the size of Europe where only 25 cm of rain falls in a year. Not many plants grow there ....

Presenting wildlife in a fresh and exciting way, DK's classic Look Closer series awaits a new generation. This book uses a combination of simple text and close-up photography to bring readers face-to-face with nature.