Following books on Macroeconomics and Advanced Business Mathematics are available over internet with certain licensing rules. Few books have limited preview permission.
Part A: Macroeconomics
Agarwal, V. Macroeconomics theory and policy.
Dwivedi, D. N. Macroeconomics theory and policy
Ahuja, H. L. Macroeconomics.
Dornbusch, Fisher and Startz. Macroeconomics.
Part B: Advanced Business Mathematics
Rosser, M. Basic Mathematics for Economists.
Ummer, E. K. Basic Mathematics for Economics, Business and Finance.
Page, W. Applications of Mathematics in Economics.
Bhardwaj, R. S. Mathematics for Economics and Business.
Akhilesh, K. B. and Balasubrahmanyam, S. Mathematics and Statistics for Management.
Hazarika, A. A textbook of Business Mathematics.
Soni, R. S. Business Mathematics with applications in Business and Economics.
Werner and Sotskov. Mathematics for Economics and Business.
Bradley, T. Essential Mathematics for Economics and Business.