Best and Easy book for IT & SM

I would suggest Dinesh Madan as suggested by Aman also..

However, You have to cope-up  with institute study mat coz in last few terms questions are based of Study mat.

Dinesh Madan will bosst your concept and Mat will help you to score more marks...

Both are needed to score more...

Dinesh Madan is easy to understand and its very practical.

Paduka + Practise manual will be very help full..to get over the exemption marks...

I suggest to u to follow Aryan advice and as your wish.