Hello dear

In my opinion RS aggarwal is very good book and dont waste time on collecting other books.

Instead do practice more, develop and learn simple caluclation tricks of vedic maths and their are many books available for vedic math tricks for caluclations.

Just go through the basic formulas through RS aggarwal and learn some vedic tricks and do practice, practice and practice of questions. Thats it.

Thanks for contacting us.