"Aag ka Darya" is a novel written by the renowned Pakistani author Qurat-ul-Ain Haider. Published in 1959, it is considered a significant work in Urdu literature. The story spans several centuries and explores the lives of its characters against the backdrop of historical events in the Indian subcontinent. The narrative weaves together themes of love, loss, and the quest for identity. It delves into the complexities of human relationships and the impact of societal changes. The novel's rich prose and intricate storytelling have earned it a place as a classic in both Pakistani and Indian literary circles.