Hi .... I am a beginner and just started basics. I need extra effort on the quant portion. I have the OG 12th edition and Barron's 15th edition. I started preparation with Barron's but the book is not upto the mark. So please let me know which book to follow in order to master in quant.
The Manhattan study guides are good to brush up your basics. They cover all the GMAT topics in depth and have useful tips & strategies as well. Here is a link to their materials for quant.
https://www.manhattangmat.com/storeitems ... 41&catid=1












