The book introduces the life and work of 22 prominent Bulgarian scientists who contributed to the development of zoology in Bulgaria. They are creations of the last century until today and all are now deceased. Presents the main stages of their lives, as attention is turned primarily on their research and their contributions to the development of Bulgarian and international zoological science. Are also affected their teaching, promotional and social activities. For most of the zoologists book authors share personal memories and judgments, which makes it even more vivid their imagery.