Magical Pathworking by Nick Farrell is an excellent topic on using the imagination as gateways on the astral and within ourselves. As well as how we can use the subconscious mind to heal ourselves of traumatic events. I really enjoyed this book and it gave me a deeper understanding of what the term Pathworking means in the western tradition. I may buy his other book on talismans if I can find a better price on amazon.
http://www.amazon.com/gp/product/0738704075/ref=cm_cr_ryp_prd_img_sol_0
My 2 cents, Peace