Sri Isopanishad / Sri Ishopanishd by A . C . Bhaktivednta Swami Prabhupada ( Bhaktivedanta Book Trust ) Iskcon , Paperback in English

Shri Ishopanishad, is one of the shortest Upanishads, embedded as the final chapter (adhyāya) of the Shukla Yajurveda. It is a Mukhya (primary, principal) Upanishad, and is known in two recensions, called Kanva (VSK) and Madhyandina (VSM). The Upanishad is a brief poem, consisting of 17 or 18 verses, depending on the recension.