Firstly I would suggest you to prefer NCERT books then here are some of the books which you can prfer for the exam preparation:

Physics:
Fundamentals of Physics  By- David Halliday, Robert Resnick, Jearl Walker; Publisher: Wiley
Concept of Physics By- DC Pandey
Chemistry:
Moderns ABC of Chemistry for Class  XI With CD By- Modern Publishers
NCERT Physical & Organic Chemistry By- OP Tandan
Mathematics:
Mathematics For Class XI By- R. D. Sharma; Publisher: Dhanpat
Biology:
Elementary Biology (Volume - 1)By- K.N. Bhatia, M.P. Tyagi; Publisher: Trueman

Good Luck!