India's biggest cover-up is an investigative insight into the Netaji mystery and its stranger than fiction subplots. Relying heavily on official records—the bulk of them still security classified in violation of democratic norms—the book uncovers a systematic obstruction of justice by the Government of India. First, for any book in India, the narrative has been augmented with excerpts and images of still-secret records. Archival material and information obtained under the freedom of information Act of India, the US and the UK has also been made use of.