The Young Architect by Neelam Verma. The complete book for B. Arch. entrance exam preparation.

https://notionpress.com/read/the-young-architect

NATA comprises of Perspective drawing, 2D, 3D and aesthetic sensitivity test. So there is no ideal book from where you can learn and the questions have no fixed pattern as they keep on changing. So don't just refer one book but, go through all books (or at least as many as you can). If there is something that you don't understand for example shade shadow, toning, different types of perspective drawings then you can also refer YouTube videos for reference.

Its always better to be a step ahead, so read a lot about up coming buildings, architects, material used, etc.

I'll list a few books which you can refer to :

NATA & B.Arch Question Bank  by Ar. Shadan Usmani

NATA & B.Arch complete self study material: entrance examination by  Ar. Shadan Usmani

A Complete Self Study Guide for B.Arch by P. K. Mishra

B.Arch Entrance Examination Guide by Surendra Kavimandan

Some coaching institutes also provide a full set of self study books. I'm adding a link to two such coaching institutes:

NATA Study Material and Online Test Series

Buy Nata Entrance Books online- Mosaic Institute of Design

Also some links from where you can buy books :

Books for NATA (National Aptitude Test in Architecture) and Architecture Aptitude Test

Nata Study Material, Nata Books, Nata Model Papers, Nata Sample Papers Free Download

BEST NATA BOOKS 2016 - RECOMMENDED BY TOPPERS

Hello Putala Harika. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I would like to direct your attention to this Quora question for more information about the books to prepare for NATA:

• https://www.quora.com/Which-books-should-I-study-for-the-NATA-entrance-exam

Summary: Some of the best books are:

• NATA & B.Arch Question Bank  by Ar. Shadan Usmani
• NATA & B.Arch complete self study material: entrance examination by  Ar. Shadan Usmani
• A Complete Self Study Guide for B.Arch by P. K. Mishra
• B.Arch Entrance Examination Guide by Surendra Kavimandan

Hope this helps you and all the best!