The book, published by Random House India, will be launched on September 24.
"The Lowland" is about the lives of brothers Subhash and Udayan.
Born just 15 months apart, they are inseparable and are often mistaken for each other in the Kolkata neighbourhood where they grow up.
But they are opposites, with gravely different futures ahead. It is the 1960s, and the charismatic and impulsive Udayan finds himself drawn to the Naxalite movement.
Subhash, the dutiful son, does not share his brother's political passion; he leaves home to pursue a life of scientific research in a quiet, coastal corner of America.