Hello,

best books for ssc cgl are-

• Quantum CATSarvesh, K Verma ,Arihant Publication
• Elementary and Advanced Mathematics, Kiran Publication, KD Campus
• Quantitative Aptitude for Competitive Examinations, RS Agrawal, S CHAND
• SSC Quantitative Aptitude SmartBook In English
• Corrective English, A.K Singh
• Word Power Made Easy

Hope this information helps!!!

Thank you.