Hey dear, you can get study materials from online educational websites and here i am mentioning some of the good books for ICAR:

1. ICAR AIEEA  by RP gupta.

2. Botany by Ac dutta.

3. Arihant organic chemistry.

4. Bahal and bahal organic chemistry.

5. Coordinate chemistry by S.L LONI

6. H.c verma for physics.

7. MTG(biology today).

8. Ncert biology part 1 and 2.

9. Morrison boyd for organic chemistry.