We suggest you to follow and read these books and practice majorly mock exams and analyze all weak areas and revise them regularly so you dont repeat agaun. All booklist below.

Microoeconomic Theory  by Hal Varian, Intermediate Microeconomics,7e by Rubinfield and Pindyk , Microeconomics Macroeconomic Theory by Dornbusch and Fisher which is best of all, Macroeconomics,6e by Mankiw.