While the Bhagavad Gītā is an acknowledged treasure of world spiritual literature, few people know a parallel text, the Īśvara Gītā. This lesser-known work is also dedicated to a god, but in this case it is Śiva, rather than Kṛṣṇa, who is depicted as the omniscient creator of the world. Andrew J. Nicholson's Lord Śiva's Song makes this text available in English in an accessible new translation. A work of both poetry and philosophy, the Īśvara Gītā builds on the insights of Patanjali's Yoga Sūtra and...