The book is a resource and energy management guide for public school students. The book answers the questions: what is energy, what are the sources of energy - traditional and non-traditional, renewable and non-renewable. Presents a description of existing methods of energy use and proposals for its more efficient use. As part of one news, I posted two available versions of the book - in Russian and Ukrainian, respectively . At the same time, I should note that, contrary to common practice, the Ukrainian-language version turned out to be more qualitative both in terms of content and design despite the fact that, obviously, both books were released as part of one educational project. Thus, for those who speak Ukrainian, I strongly recommend the Ukrainian-language version. P. S. Eight years ago, when studying at a specialized specialty at a university, the general course of energy saving was taught on materials significantly inferior to the Ukrainian edition for schoolchildren.