Which edition of Laxmikant Polity should I buy for the latest updates for UPSC?

The 8th Edition (2026) of M. Laxmikanth’s Indian Polity is the most relevant version for UPSC 2025–26. This "Courseware" edition is fully updated with 95 chapters, including three new additions and the latest constitutional amendments and Supreme Court judgments.
It includes 40+ conceptual videos and an eBook via the McGraw Hill Edge platform. For practice, it features solved Prelims questions (2013–2025) and Mains questions from the last 12 years. If you already have the 7th edition, you can simply supplement it with current affairs rather than buying the new one.