What are the best books to prepare from JEE and BITSAT 2017 ?

You can refer below books-

PHYSICS

1-NCERT Physics of Class 11th and 12th for theory and additional exercise questions.
2-Concepts of Physics by H.C.Verma vol. 1 and 2 for both theory and numerical. (Best book for BITSAT Physics)
3-Understanding Physics series of Arihant Publication by D. C. Pandey for practice.
4-AIEEE(JEE Main) and IIT-JEE (JEE Advanced) previous years objective questions for practice.

CHEMISTRY

1-NCERT Chemistry of class 11th and 12th for theory and questions (Best Chemistry Book for BITSAT).
2-Physical Chemistry by P. Bahadur for theory and numerical.
3-Inorganic chemistry by O.P.Tondon for everything in inorganic chemistry.
4-Arihant Organic Chemistry for both theory and practice.
5-AIEEE(JEE Main) and IIT-JEE (JEE Advanced) previous years objective questions for practice.

MATHS

1-NCERT Mathematics of class 11th and 12th for basics
2-Objective Mathematics by R.D.Sharma for objective approach.(Best maths book for BITSAT)
3-Arihant Maths series by S.K. Goyal for indepth understanding and Practice
4-AIEEE(JEE Main) and IIT-JEE (JEE Advanced) previous years objective questions for practice.