<p>I suggest BARRON’S Math Workbook, it helped me to increase my Math score from 460 to 690.If you want to learn theory I would suggest Grubbers or BARRON’S 2005 edition.(they contains all you need to know) If you will know it, your score will be 750+.
About CR, I don’t know, I cannot suggest.
WR review Silverturtle’s guide.</p>