I've read this book several times (four or five at least) over the past years, and each time I walk away sated. The volume of essays was actually compiled/written by one of Zimmer's students, the famous Joseph Campbell, who spent nearly a decade collecting and publishing Zimmer's works posthumously. Zimmer himself was a refugee from Nazi Germany who ended up teaching in the US and passed away in the early 1940s.
This isn't a history of Indian art, but articles about key aspects of Indian religion--the gods and their vehicles, lotus, elephants, the triad of Brahma, Siva and Vishnu, the wheel of rebirth, the Mother Goddess...inspired by the myths alone, although using some sculptures and art works as illustrations. (His apparent 'disinterest' in such forms later was the cause of most of the criticism of his work by later scholars. The great scholar of Indian temple architecture, Stella Kramrisch, noted for example that Zimmer had never even seen a Hindu temple.)
But this isn't why one reads this volume. One reads it for the absolutely wondrous way Zimmer relates these classic myths of Hinduism. He is the consummate storyteller, as in the tale of the holy man Markandeya, who is described in a creation myth as "wandering inside the god, over the peaceful earth, as an aimless pilgrim, regarding with pleasure the edifying sight of the ideal vision of the world...[until] an accident occurs. In the course of his aimless, unending promenade, the sturdy old man slips, inadvertently out through the mouth of the all-containing god. Vishnu is sleeping with lips a little open; breathing with a deep, sonorous rhythmical sound, in the immense silence of the night of Brahma. And the astonished saint, falling from the sleeper's giant lip, plunges headlong into the cosmic sea." (p. 38)
I can think of no better volume to begin with for those commencing a study of classical Indian art through its myths than this one. In their telling, they reveal the major teachings of Hinduism and each story's meaning as a component of the whole. As explained in the introduction, its "purpose is to fathom the major areas and problems, the dominant symbols and most significant features of the abundant world of Hindu myth". This it does admirably and is the reason why I keep returning.