Swami Kriyananda was a monastic, a swami of the Giri branch of the Swami Order. So was his guru, Paramahansa Yogananda, and his guru's guru, Swami Sri Yukteswar. He was a determined promoter of the principles of yoga all over the world. For more than 65 years, he taught the principles of ancient Raja (or Hatha) yoga, adapted to the needs of common people in day-to-day life. He wrote upwards of 150 books, covering expanded topics such as relationships, leadership, spirituality, education, yoga, science, art, philosophy and more. He also wrote comprehensive commentaries on the Bhagavad Gita, the Bible and other scriptures.
Swami Kriyananda is known as the founder of the Ananda communities movement. Following Yogananda's dream to build spiritual communities, he founded the first one in Sierra, Nevada, now known as the Ananda Village. More comunities have developed over time and nowadays Ananda communities and centers can be found in America, Europe and India.