Hello Rakshita,

Here is the list of some important books for NATA preparation

1. A self study guide for B Arch by PK mishra

2. A visual dictionary of architecture by Francis DK Ching

3. Engineer drawing by N D Bhatt and Pancha

4. Verbal and non verbal reasoning , Maths XI &XII by RS Agarwal.

5. Complete architecture entrance guide by Ar.Ashok goel and Arjun Kamal

Here is the list of few important books for KCET Exam

1. Karnataka CET explorer for engineering by MTG

2. KCET 14 years solved papers by ARIHANT

3. NCERT books for physics, biology chemistry and mathematics

I hope this helps