The rich variety of life on Earth is a breathtaking culmination of natural evolution, with all natural ecosystems and cultivated lands teeming with biodiversity. This diverse array of flora and fauna is essential for a healthy, vibrant, and sustainable biosphere. The book Biodiversity: Concepts, Crises and Conservation is an authoritative and comprehensive guide to the subject, written by a renowned academician, expert, and celebrated author. It covers all aspects of biological diversity, from conception to recognition, discovery, and practical conservation for future generations. The book is structured to provide mental agility exercises for students across multiple disciplines, including life sciences, biological sciences, environmental sciences, agricultural sciences, geography, and natural resource management. It is also a useful resource for planners, policy-makers, environmental activists, government, and non-government organizations. The book delves into emerging concepts, ongoing crises, and potential conservation tactics of biodiversity, and it is composed in a textbook style that is both enriching and innovation-disrupting. It presents magnificent scenarios of agrobiodiversity, pedo-biodiversity, and biodiversity in chemosynthesis-based communities, as well as examining biodiversity-climate links and discussing the vital biodiversity-sustainability relationships. The book elucidates biodiversity-based sustainability principles and provides operationalization techniques. The book is an essential resource for anyone seeking to understand and conserve the rich diversity of life on Earth.