Your search for "ancient" revealed the following:

Kabbalah (Your Path to Inner Freedom)

PATANJALA YOGA SUTRAS with Detailed Commentary (with Transliteration, Translation & Commentary)

Flora in the Bhagavata Purana

HINDU POLITY: A CONSTITUTIONAL HISTORY OF INDIA IN HINDU TIMES

Accupressure Therapy for overcoming Physical, Psychological and Spiritual Distress (Introduction) and Common Ailments [Set of 2 Vol]

Scienco Spirituality (Connecting Science With Spirituality)

Hindu Horary Astrology

The Asokavadana (An Old and Rare Book)

Exploring The Hindu Mind (Cultural Reflection and Symbolism)

Origin of Brahmi Script (The Beginning of Alphabet In India) (An Old and Rare Book )

That Alone The Core of Wisdom (A Commentary on Atmopadesa Satakam The One Hundred Verses of Self-Instruction)

Somadeva’s Yasastilaka (Aspects of Jainism, Indian Thought and Culture)

Panchakarma Illustrated

The Life of Buddha as Legend and History

Herbal and Yogic Remedies: For Common Ailments (Also Health Myths and Facts)

Atreyasiksa (A Siksa of The Taittriya School)

When Mirrors are Windows

The Wealth of Indian Alchemy and Its Medicinal Uses (Second Revised Edition) (In Two Volumes)

Parables (Brilliance of Vedanta, Through Simple Stories)

The Heartfulness Way - Heart Based Meditation for Spiritual Transformation