Guided Self-study: Rudolf Steiner’s Path of Spiritual Development: A Spiritual-Scientific Workbook

Great introduction to Rudolf Steiner's work. I do encourage you to read the full text of "How to Know Higher Worlds" by Steiner after you read the excerpts in "Guided Self-Study" - it's very suited to our modern approaches to self-development.

As always, Torin's warm and insightful resource