Books on Mysticism

1. For the philosophically and historically minded, a foundational book for western theology has been "Mysticism East and West" by Rudolf Otto. Ever wonder where the classic phrase "mysterium tremendum" came from?

2. And for those steeped in reformation theology and the roots of western mysticism, you might find Jacob Boehme's "The Signature of All Things" of interest.

3. A good survey and introduction is "Thirsty for God: A Brief History of Christian Spirituality" by Brad Holt (Augsburg).

3. Although it may be well-worn, a book to ponder regarding the non-rational experience of God is still CS Lewis "Miracles".

4. A book that helps you reflect on the  "popular mysticism" which is what is usually meant by seekers ... try "The Spiritual Tourist" by Mick Brown (Bloomsbury Press) ... endorsed by the author of "Zen and the Art of Motorcycle Maintenance"