No. The government does not provide free PDFs of copyrighted books. Only the bare text of the Constitution is freely available (e.g., on legislative.gov.in).
Yes – National Book Trust publishes Hamara Samvidhana by the same author. subhash c kashyap our constitution pdf
The 7th or 8th edition (check National Book Trust website for updates). Always use the latest edition for amended articles. subhash c kashyap our constitution pdf