which is the best nata book for reference which contains every part ..drawing maths etc?
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If we talk as per section-
Drawing - Most NATA/JEE books are lacking in drawing examples of perspective drawing required for the exam. So, I would suggest you rather go to YouTube for reference. There are lot of videos that discuss various concepts like perspective and colour theory, etc. You can check them out here - Drawing Videos
Aptitude - this is something you can find in books like Arihant or RS Agarwal (Quantitative Ability).
Maths - For maths its best to follow NCERT books, as the difficulty level is not that high.