Similarly, India Year Book, Eco Survey and Budget have generally 1500+ pages altogether. Also Laxmikant page is too heavy to read while our page is smaller and easy to comprehend. And we never missed any Polity question in UPSC. 800 pages while our Polity Book has 250 pages. Crisp because while others read so many other books, you just need to read 6 Books of 250-300 pages each.We are saying this with confidence because you need just 50-55 Qs to clear Prelims, we have always delivered between 75-80 out of 100 Qs. Read them thoroughly, in-between the lines. When we say 'anything else,' it really means.
Basically, the idea is that, with these notes, YOU DON'T NEED TO STUDY ANYTHING ELSE.