The Theosophical Society of America's Guide to the Bhagavad Gita
https://www.theosophical.org/files/resources/selfstudy/Gita.pdf
A detailed, 28-lesson self-study course on the Gita.
Perennial Philosophy Wikipedia
https://en.wikipedia.org/wiki/Perennial_philosophy
A description of the Perennial Philosophy used to introduce the Gita in the Introduction.
Invitation to World Literature: The Baghavad-Gita
http://www.learner.org/courses/worldlit/gita/watch/
A video introduction to the text with various scholar and practitioner perspectives.
