There are many books and CDs on the subject of Japa Yoga, mantras and the Yoga of sound. Here are some we highly recommend:
Japa Yoga: A Comprehensive Treatise on Mantra-Sastra by Swami Sivananda – A detailed, comprehensive guide to the practice of mantra repitition. Simple, inspiring, and useful for beginner and adept alike. “Just as fire has the natural property of burning things, so also the Name of God has the power of burning the sins and desires.” –Sri Swami Sivananda (Read the entire book here)
Meditation by Sri Swami Satchidananda – A thorough overview of the various techniques of meditation in relatively few pages.
Mantras Words of Power by Swami Sivananda Radha
Swami Sivananda Radha explains the meaning of various traditional mantras, gives the benefits of mantra in daily life and demonstrates how these sacred syllables can be used to focus the mind and to increase awareness. Once the power of the mantra is attained, healing can also be experienced.
Mantra Yoga & Primal Sound by David Frawley
Modern science and ancient wisdom traditions agree that the universe is a symphony of vibrational frequencies. This beautiful, comprehensive and unique work elaborates the essential truths about cosmic sound, and how we can employ important mantras for healing, transformation and inner awakening.
Yoga of Sound by Russill Paul
Healing and enlightenment through the sacred practice of mantra — includes book and 45 minute 21 track CD of music and exercises. The author is an acclaimed musician of classical Indian and contemporary music and conducts workshops and retreats on Nada (sound) Yoga throughout the world. Learn the art of mantra, reduce stress, enhance emotional well-being, and optimize the inner flow of energy.
Guided Meditation led by Sri Swami Satchidananda Led by Sri Swami Satchidananda – This CD gives instruction in mantra japa (mantra meditation) by one of the most beloved Yoga masters. It includes instruction in four other techniques–gazing, observing the breath, listening to the breath and self inquiry–all of which can lead to a meditative state. Concludes with a short, guided meditation, during which any of the techniques given may be practiced.
Sacred Mantra Series by Sri Swami Satchidananda
A beautiful series that includes different mantras (OM Shanti, Hari OM, Gayatri and more) chanted by Yoga master Sri Swami Satchidananda.
Ajapa Japa Breath Mantra Consciousness by Swami Shankardev Saraswati
A complete system for healing, self-development and spiritual awareness, the practice of breath mantra (ajapa japa) reveals the mantra that is hidden within our own existence, and in the universe itself. By tuning into and aligning ourselves with this great and powerful mystery we synchronize our deepest Self with the expansive cosmos. Our inner and outer life become one and we experience the bliss of living an authentic and meaningful life.
Lost Chord by Jonathan Goldman
From healing sounds pioneer and chant master Jonathan Goldman. A sonic journey through the chakras and the Kaballistic Tree of Life, designed for deep meditation and healing. Features sacred mantras, overtones, and chants from the Hindu, Tibetan, and Hebrew traditions as well as psycho-acoustic frequencies and sacred ratios. Also visit Jonathan and Andi’s website, HealingSounds.com for all their sonic offerings & events.
Healing Mantras by Thomas Ashley-Farrand
Master practitioner Thomas Ashley-Farrand demonstrates how to voice over twenty mantras with perfect precision — a key to their effectiveness.
Bija Mantra by Vyaas Houston
Vyaas Houston is a master Sanskrit teacher and founder of the American Sanskrit Institute. The chakras are the core energy centers of the body. These vital nodes are sympathetic to the vibrations of ancient seed mantras. CD includes two sessions, one to orient yourself to the chakras, bijas and special techniques, and the second features extended chanting to balance and energize the chakras. Pronunciation guide and diagrams included.
Swamij.com: Swami Jnanesvara Bharati, a disciple of Swami Rama (Himalayan Institute) has a website that contains a lot of information on use of a mantra in Yoga practice.