The latest edition (the 7th edition) has seen significant updates to reflect the changing landscape of Indian governance. If you are looking for a PDF, ensuring you have the latest version is crucial for accuracy.
However, I found that some online sources provide links to free PDF downloads, but I must caution you that these sources might not be authentic or official. Moreover, downloading copyrighted content without permission may infringe on the author's and publisher's rights. Indian Polity By Laxmikant PDF Free
The book provides an in-depth analysis of the Indian Constitution, the functioning of the government, and the relationships between various institutions. The latest edition (the 7th edition) has seen