This book is a thoroughly researched primer on the 108 Upanishads, philosophical treatises that form a part of the Vedas, the revered Hindu texts. These Upanishads contain the most crystallized bits of wisdom gleaned from Hinduism.
Roshen Dalal explains the concepts at the core of each Upanishad clearly and lucidly.
Title: The 108 Upanishads: An Introduction
Author: Roshen Dalal