The background of these thrillers is the middle of the 19th century. Even though the fire of the Sepoy Mutiny has died down, discontent is gradually accumulating in the minds of the people. In the meantime, Bidur arrives from the village to the city. Some of his family members were killed by the British during the Sepoy Mutiny. Bidur becomes a rebel to take revenge on them and the oppressed people. These three novels of Bidur are thrillers of that rebellion and resistance. He punishes the treacherous Indians working for the British, the tyrannical indigo farmers, or the cruel local landlords. Bidur shines with courage and honesty. He is an outspoken rebel against oppression. The three thrillers in this book depict the old 19th century Calcutta. The story takes a turn at every turn. There are unexpected twists. Although these three thrillers are written for teenagers, they are equally enjoyable for readers of all ages.