How to effectively study direct tax

which book i should follow other than vinod gupta as it is too vast 

please suggest me whether i should go for girish ahuja or t n manoharan. I need to understand only some topics rest i will do from study material and PM.

I agree with ankita gandhi, inspite of the fact tht VG's book is vast, u could be able to get high score only with this. My personal experience says instead of focusing too much on solving practice manual, you should hv a conceptual clarity too much is possible for you. As without knowing the real concept what law maker wanna say, its not possible to present your answer in an accurate manner, which helps you to get good score in exam.