Book excerpt: : Ojas is important concept of Ayurveda which is not explained properly by ayurved comunity .This book mainly explains the concept of ojas from samhita and commentary , latest reserach on ojas and immunity.this book is very helpfuly for pg scholar who wanted to done research on it and also for the ayurveda fraternity to deeply understand the concept of Ojas , today we are doing lot of reserch on the method to increase immunity of the body so ojas has very important role in the increasing immunity in natural ways so this book is also beneficial for the society .