CAVES OF TERROR is an adventure novel of colonial India by British writer, TALBOT MUNDY, first published as a serial titled The Gray Mahatma in the pulp magazine Adventure in 1922 before being released in book form in 1924 by GARDEN CITY PUBLISHING OF NYNY. It features his recurring characters Athelstan King ( KING OF THE KYBER RIFLES) and Jeff Ramsden, who become entangled in political intrigue and mysticism in India, centered around the mysterious "Gray Mahatma" and the enigmatic Princess Yasmini. The story combines action, espionage, and supernatural elements as the protagonists navigate a world of ancient secrets, cults, and power struggles in the British colonial era. It's known for its exotic setting, fast-paced plot, and exploration of themes like colonialism and cultural clashes, though it reflects some dated colonial perspectives. Involves a quest to uncover the secrets of the Gray Mahatma, leading to mystical experiences in underground caves and encounters with powerful figures like Princess Yasmini. Themes include colonialism, espionage, cultural clash, and the search for hidden knowledge. A classic of adventure literature, celebrated for its intricate plot and evocative setting.