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[Mary]

Princeton Readings in Religions as described here:
https://press.princeton.edu/catalogs/...

includes
Religions of India in Practice
Religions of India in Practice
Religions of Japan in Practice
Tantra in Practice
Religions of the United States in Practice, Volume 1
Religions of the United States in Practice, Volume 2
Religions of Tibet in Practice
Religions of Korea in Practice
Buddhism in Practice
Medieval Christianity in Practice
Islam in South Asia in Practice
Yoga in Practice

[rivka, Former Moderator]

That does not appear to meet the Goodreads criteria for a series.