“Microbiome in Health and Disease: Integrated Perspectives on Host–Microbe Interactions, Diagnostics, and Therapeutic Modulation Across Human Tissues” brings together core concepts and current thinking in its subject in depth, the work of Prof. Namita Nath Kumar. It balances foundational theory with practical, real-world application, making complex ideas accessible without losing depth. Aimed at students, researchers, and academic readers, it is published by Khushbu Publications, New Delhi, India, and released in 2026.