Written with clarity and academic rigour, “The Microbiome in Oral and Early-Life Health and Disease: Ecology, Pathogenesis, Horizontal Gene Transfer, and Translational Microbial Profiling Across the Oral and Infant Gut Microbiomes” examines its subject in depth, the work of Dr. G. Venkata Ratnam. 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.