Preparing for the SSC CGL exam requires the right set of books that cover all subjects comprehensively. For Quantitative Aptitude, Quantitative Aptitude for Competitive Examinations by R.S. Aggarwal and Fast Track Objective Arithmetic by Rajesh Verma are highly recommended for concept clarity and speed practice. https://blog.careerwill.com/best-books-for-ssc-cgl-preparation/