Reading of different books on a single subject is more than good but as far as law is concerned, my advice is, study only those books which u have studied in LL.B.
Check questions in previous papers, solve all those questions by making notes and then start upgrading ur these notes with case refrrences, quotations etc....
So, in beginnig, only prepare simple notes and understand wht is says and then go for its upgradation by studying other good books.
you may consult notes but try to be different from others.
you may make good notes than khurram....