1909: in a villa in South Ascot, an extraordinary secret is about to be shared. Princess Sophia Duleep Singh - suffragette, firebrand, daughter of the last Maharajah of the Punjab - arrives with a burden that could threaten the foundations of the British Monarchy. At the heart of her visit is the Koh-i-Noor: the 'Mountain of Light', the ultimate symbol of Imperial seizure. Tracing a trail of colonial plunder from the Treasury at Lahore to the drawing rooms of the Edwardian elite, Immortal Diamond is part high-stakes mystery, part tragic exposure of Imperial hypocrisy. A novel about loyalty, illusion, and the enduring sparkle of resistance.