Many coaching institutes (like Vajiram or Vision IAS) create 100-page summary PDFs of the Laxmikant 7th edition. These are legally free summaries. You can save these to Google Drive and use them alongside the hardcover book.
The 6th edition served students well for years, but the 7th edition brings critical updates that are essential for the current exam pattern. Key updates include: Many coaching institutes (like Vajiram or Vision IAS)