It was first published in 1990, as a companion to the BBC radio series of the same name. The theme of documentary was to feature animal species which were endangered or threatened with extinction.
This is a guidebook published by Harper Collins, aimed at boys from eight to eighty. It covers around eighty topics, including how to build a treehouse, grow a crystal, or tell direction with a watch. Also included are famous quotes, stories, battles, and phrases that every boy should know.