This book is carefully structured. It organized a lot of facts into a system. Virtually all aspects of conservation biology are presented. The book is of interest and use to all involved in nature conservation, environmental protection, and biodiversity protection. With some variations and changes, the book was published in several languages in different countries. Among these editions are the books in Spanish, Russian, Czech, Bulgarian. Fragments of the book were also translated in Romanian.The book is relevant, featured and highly recommended.