What are the best books for aiims 2018. I am a private student .any update Neet in nios

There is no update for NIOS student so I would suggest you to wait till any information comes out for NEET 2018.

Also, if you talk about your AIIMS preparation then NCERTs should be your first choice as these are good to make the basics clear and strong, apart from that below reference books will be helping you -

Biology -

Trueman’s Biology Vol. 1 & 2

Objective Biology by Dinesh

Pradeep Publication’s Biology

Prakash Objective Biology

Phyics -

H C Verma for Physics

Aggarwals’ Concept of Competition Physics for CBSE PMT

Chemistry -

Modern ABC of Chemistry for Class 11th & 12th (Vol. 1 & 2)

Physical Chemi stry by O P Tandon

Arihant Organic Chemistry

Dinesh Chemistry

Objective NCERT at your fingertips Chemistry by MTG

General Knowledge - It would be better to read newspaper on daily basis just to get all day to day information and along with this, you can subscribe weekly or monthly current affairs magazine and pay proper attention to science section.

Good Luck!!!