Your search for "yoga" revealed the following:

Material Success Through Yoga Principles (Set of 2 Volumes)

Yoga Philosophy (In Relation to other Systems of Indian Thought)

The Complete Book of Yoga: Harmony of Body and Mind

Life Poetry Yoga - Personal Letters (Set of 3 Volumes)

Spirit On The Move (Personal Essays on Yoga in Daily Life)

Abstracts and Bibliography of Articles on Yoga from Kaivalydhama

Yoga Research and Cultural Synthesis (Souvenir of the 6th International Conference)

Enlighted Pharmaco Therapeutics of Ayurveda (A Book on Aushadha Yoga Profiles)

Musings on Yogavaasishta (Yoga Vasistha) – Part IV (The Calm Down)

Samkhya Karikas (The Foundation of Yoga Philosophy)

YOGA - A Study of the Mystical Philosophy Of the Brahmins and Buddhists

A Handbook of Yoga - Nidra (Sanskrit Text with Transliteration and English Translation)

The Yoga of Kirtan - Conversation on The Sacred Art of Chanting

Musings on Yogavaasishta (Yoga Vasistha) Part I (Vairaagya and Mumukshu Vyavahaara Prakaranaa)

The Path of Modern Yoga - The History of an Embodied Spiritual Practice

Realization of the Supreme Self: The Bhagavad Gita Yoga-s

"BABAJI'S KRIYA YOGA: Deepening Your Practice" By Jan "Durga" Ahlund and M. Govindan

Living Within (The Yoga Approach to Psychological Health and Growth)

Renunciation & Salvation-Yoga-Vasistha (An Old and Rare Book)

Raja Yoga For Everyone- Overview and Practice Capsules (The 2nd Chapter)