GK is volatile. Revisit the "Miscellaneous" section at least once a week.

Check the publisher’s website (e.g., Arihant, Upkar, or the specific publication house for Tarun Goyal). Many publishers now offer a "Combo" of Physical Book + Free PDF access.

Partially. For UPSC, you need deeper understanding (NCERTs + Standard books). Tarun Goyal GK is excellent for UPSC CSAT paper's General Awareness section and for State PCS exams, but not as the sole source for UPSC Mains.

This is often a high-scoring area. The Tarun Goyal PDF covers:

: Covering essential general science and national news. Tarun Goyal GK 2024 Latest Edition | PDF - Scribd