In conclusion, R.C. Chandna's book on population geography provides a comprehensive analysis of the distribution, composition, migration, and growth of population. The book highlights the spatial patterns of population distribution, population growth, and migration, and provides insights into the complex relationships between population and environment. The concepts discussed in the book have significant implications for policy makers, researchers, and students of geography, as they seek to understand and address the challenges associated with population growth, urbanization, and resource management.