The structure of electronic library system of URIGHT Publishers (Moscow) specializing in academic book publishing for universities and colleges is discussed. The system comprises publications in natural sciences. Hypertextuality, interactivity and multimedia are the key features used efficiently and completely to design digital derivative learning materials in natural disciplines and corresponding parts of the electronic library system specifically for gaining knowledge and learning in natural sciences. This specific character is defined by objective and universal character of this knowledge, its accuracy, uniqueness, invariance, as well as by the structuredness of scholarly knowledge. Many objects and processes of the nature call for static and dynamic visualization. Links to the core structural elements, full-text search, bookmarkers, video, animation, and tests are available. URIGHT Electronic Library System also comprises the works by prominent natural scientists of the past and classics of popularization. With few exceptions, the classical scholarly works are published as texts with hypertext links which is a sufficient fitting. The classic popular publications are additionally supplied with videos which is seen as a rational solution. The article will be of interest to the librarians in universities and colleges teaching natural sciences and disciplines as well as to academic publishers specializing in the area.