This book tries to critically examine the changing dimensions and criticality of Postcolonial theory and praxis in Indian novels in English, written in the 21st century. In the changing world order and systems, the issues of environment, Diaspora, refugee crisis, individual loneliness and alienation at the political and individual levels are the major issues which Postcolonial theory examines now. The book looks at four majorauthors of the 21st century from India writing novels in English – Amitav Ghosh, Salman Rushdie, Jhumpa Lahiri and Arundhati Roy. They are very different authors in their own rights, and yet they reach a point of singularity where the question of existence and identity coalesce through different parameters of social, political and ideological constructs. The book looks at the issues of environmental crisis, identity crisis, issues of dislocation and alienation and gender trouble as represented in the novels selected for study in this critical collection.