I would like to recommend a book and a yoga nidra CD by Richard Miller Ph.D.: Yoga Nidra - The Meditative Heart of Yoga
His wise guidance is clear and inspiring, and is a great tool for teachers and students alike. I always feel refreshed and balanced after yoga nidra and teach it to my prenatal students who find that it helps alleviate fears associated with pregnancy; as well as bringing about deep relaxation. Richard Miller has a soft melodic voice that my labrador also loves... He will come and lie down beside me whenever he hears this CD go on.