Surbhi bansal or...

@ mik: I recommend you to complete the whole PM first, then if u get additional time u can go for reference book, because there is no point in reading reference book without completing PM. Reference book can help u get understanding of the topic. So if u can't understand any topic then read that from ref. book but first go through whole PM. After completing PM u should solve last 3 years exam papers and RTPs, that will give u confidence because many questions are lifted from PM.

Yes it is true that surbhi bansal book is not sufficient bcoz book give only summary it is not worthy foe exam clearance. Suggest other book. it does not cover each and every aspect given in the study materrial of course.

Reading  the same book thoroughly is enough than go for new book. If you start reading new book, there may be a possibility of confusion or conflict on what to write in exam hall.

Plz go through the same book thoroughly.