The metaphysician and art historian Ananda Coomaraswamy, whom Perry had known while studying at
Harvard, had launched the idea of an encyclopedia that would collect wisdom from around the world. It was Perry who accomplished this monumental task, which took him 17 years, and which resulted in the publication in 1971 of
A Treasury of Traditional Wisdom. This collection of more than 1,100 pages gathers thousands of quotations from all the great religious and esoteric traditions, supported by commentaries referring largely to the writings of Guénon, Coomaraswamy and Schuon. In 1978, an English publisher commissioned him to write a study on
George Gurdjieff in order to "help clear up the confusion surrounding the Armenian
thaumaturgist"; the critical work was entitled
Gurdjieff in the Light of Tradition. He is also the author of
The Widening Breach: Evolutionism in the Mirror of Cosmology (1995) and
Challenges to a Secular Society (1996), a collection of essays on the pseudo-mysticism generated by drugs, reincarnation, psychotherapy, modern gurus, Shakespeare, cosmology, and psychology. Perry has also published some twenty articles in the English journal
Studies in Comparative Religion on a variety of metaphysical and religious topics. ==Bibliography==