The Immortals of Meluha is the first book in Amish Tripathi's Shiva Trilogy, a series of historical fiction novels that reimagine the Hindu god Shiva as a human hero. The book is set in a fictionalized version of ancient India, where a land called Meluha is threatened by a war with the Chandravanshis, a neighboring kingdom that has allied with the cursed Nagas.

The Meluhans believe that their fabled savior, Neelkanth, will come to their aid in their time of need. When a mysterious stranger named Shiva arrives in Meluha, the Meluhans believe that he is Neelkanth. Shiva is initially reluctant to help the Meluhans, but he eventually agrees to do so after learning of their plight.

Shiva leads the Meluhans to victory in the war against the Chandravanshis, but he also learns the truth about the Nagas and the curse that was placed upon them. He realizes that the war was not as simple as it seemed, and that the Meluhans have been living a lie.

The Immortals of Meluha is a well-written and engaging novel that combines elements of history, mythology, and fantasy. Tripathi does a good job of creating a believable and immersive world, and his characters are complex and relatable. The book also explores important themes such as good vs. evil, the nature of truth, and the power of love.