Found in many different religious cultures, the practice of making votive offerings into fire dates back to the earliest periods of human history. Throughout the tantric world, this kind of ritual offering practice is known as the homa. With roots in Vedic and Zoroastrian rituals, the tantrichoma was formed in early medieval India. Since that time tantric Buddhist practitioners transmitted it to East and Central Asia, and more recently to Europe and the Americas. Today, Hindu forms of the homa are being practiced outside of India as well. Despite this historical and cultural range, the homa retains an identifiable unity of symbolism and ritual form. Homa Variations is the first volume to provide a series of detailed studies of a variety of homa forms. This collection of essays provides an understanding of the history of the homa fromits inception up to its use in the present. The book also covers homa practice throughout a wide range of religious cultures, from India and Nepal to Tibet, China, and Japan. The theoretical focus of the collection is the study of ritual change over long periods of time, and across the boundaries ofreligious cultures. The identifiable unity of the homa allows for an almost unique opportunity to examine ritual change with such a broad perspective.