Originally Posted by Abdul Mateen Sindhu

They are right dear. As I have done Masters in I.R, I know the worth of this mediocre book. Just read recommended books by FPSC i.e. books by Goldstein, Kegley, Andrew Heywood and Baylis. These books surely burnish your knowledge about theories of I.R with latest examples and also easy to understand. Moreover, it will comprehensively cover your third part of CA papers.
Last but not the least, the choice is yours.
Stay blessed.