Best Books For NEET - UG 2018?

Firstly I would suggest you to go through well with NCERT books to build your concept clear after that you can prefer other books.

Biology Books

Biology Vol 1 and 2 - Trueman

Objective Biology - Dinesh

Objective Biology - Pradeep Publications

Physics Books

Concepts of Physics - HC Verma

Objective Physics - DC Pandey Chemistry Books

Physical Chemistry - O.P. Tandon

Ojective Chemistry - Dinesh Publication

Good Luck!

Here are some of the NEET books referred below:
Biology :
Theory books  Truemans Elementary Biology Vol-I & Vol-II; Companion Biology by K.Bhatti (Dinesh publication)
Objective books  Objective Biology by Dinesh; AIIMS Explorer by MTG publication; Truemans Objective Biology
Physics :
Theory books  Concepts of Physics by H.C.Verma; NCERT Physics: CBSE PMT by Anil Aggarwal; NCERT- Physics Part 1 and Part 2
Objective books  Physics for Medical Entrance Examinations by D.C Pandey (Arihant Publications)
Chemistry :
Theory books  Physical Chemistry for Medical Entrance by O.P Tondon (GR Bhatla publications)
Objective books  Objective Chemistry (Volume 1 and 2) by Arihant publications

The basic rule to crack any exam is to understand your weaknesses and turn them into strengths. Therefore, keep giving mocks timely.

Good Luck.